./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 2329fc70 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-?-2329fc7 [2023-02-14 01:33:57,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 01:33:57,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 01:33:57,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 01:33:57,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 01:33:57,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 01:33:57,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 01:33:57,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 01:33:57,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 01:33:57,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 01:33:57,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 01:33:57,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 01:33:57,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 01:33:57,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 01:33:57,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 01:33:58,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 01:33:58,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 01:33:58,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 01:33:58,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 01:33:58,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 01:33:58,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 01:33:58,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 01:33:58,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 01:33:58,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 01:33:58,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 01:33:58,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 01:33:58,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 01:33:58,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 01:33:58,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 01:33:58,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 01:33:58,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 01:33:58,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 01:33:58,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 01:33:58,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 01:33:58,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 01:33:58,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 01:33:58,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 01:33:58,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 01:33:58,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 01:33:58,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 01:33:58,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 01:33:58,022 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 01:33:58,048 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 01:33:58,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 01:33:58,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 01:33:58,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 01:33:58,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 01:33:58,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 01:33:58,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 01:33:58,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 01:33:58,051 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 01:33:58,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 01:33:58,052 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 01:33:58,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 01:33:58,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 01:33:58,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 01:33:58,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 01:33:58,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 01:33:58,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 01:33:58,053 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 01:33:58,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 01:33:58,053 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 01:33:58,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 01:33:58,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 01:33:58,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 01:33:58,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 01:33:58,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:33:58,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 01:33:58,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 01:33:58,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 01:33:58,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 01:33:58,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 01:33:58,055 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 01:33:58,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 01:33:58,055 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 01:33:58,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 01:33:58,055 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 01:33:58,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2023-02-14 01:33:58,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 01:33:58,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 01:33:58,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 01:33:58,275 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 01:33:58,275 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 01:33:58,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_rec.c [2023-02-14 01:33:59,233 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 01:33:59,365 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 01:33:59,366 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2023-02-14 01:33:59,371 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/647ee6336/9b987db5f1c94023a9b46ede05baaf68/FLAGf4c0f3bea [2023-02-14 01:33:59,379 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/647ee6336/9b987db5f1c94023a9b46ede05baaf68 [2023-02-14 01:33:59,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 01:33:59,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 01:33:59,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 01:33:59,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 01:33:59,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 01:33:59,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765a2879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59, skipping insertion in model container [2023-02-14 01:33:59,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 01:33:59,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 01:33:59,523 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] [2023-02-14 01:33:59,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:33:59,567 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 01:33:59,577 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] [2023-02-14 01:33:59,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:33:59,608 INFO L208 MainTranslator]: Completed translation [2023-02-14 01:33:59,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59 WrapperNode [2023-02-14 01:33:59,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 01:33:59,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 01:33:59,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 01:33:59,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 01:33:59,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,646 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-02-14 01:33:59,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 01:33:59,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 01:33:59,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 01:33:59,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 01:33:59,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 01:33:59,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 01:33:59,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 01:33:59,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 01:33:59,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (1/1) ... [2023-02-14 01:33:59,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:33:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:33:59,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 01:33:59,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 01:33:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 01:33:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 01:33:59,747 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 01:33:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 01:33:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2023-02-14 01:33:59,750 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2023-02-14 01:33:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 01:33:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 01:33:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2023-02-14 01:33:59,750 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2023-02-14 01:33:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 01:33:59,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 01:33:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 01:33:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-02-14 01:33:59,751 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-02-14 01:33:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 01:33:59,815 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 01:33:59,816 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 01:34:00,068 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 01:34:00,072 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 01:34:00,073 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 01:34:00,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:34:00 BoogieIcfgContainer [2023-02-14 01:34:00,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 01:34:00,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 01:34:00,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 01:34:00,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 01:34:00,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:33:59" (1/3) ... [2023-02-14 01:34:00,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ad3a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:34:00, skipping insertion in model container [2023-02-14 01:34:00,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:59" (2/3) ... [2023-02-14 01:34:00,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ad3a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:34:00, skipping insertion in model container [2023-02-14 01:34:00,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:34:00" (3/3) ... [2023-02-14 01:34:00,080 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2023-02-14 01:34:00,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 01:34:00,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 01:34:00,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 01:34:00,155 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;@1a8912f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 01:34:00,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 01:34:00,159 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) [2023-02-14 01:34:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 01:34:00,167 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:00,167 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] [2023-02-14 01:34:00,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1639330660, now seen corresponding path program 1 times [2023-02-14 01:34:00,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:00,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257568810] [2023-02-14 01:34:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 01:34:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:34:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 01:34:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 01:34:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 01:34:00,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257568810] [2023-02-14 01:34:00,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257568810] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:34:00,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:34:00,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:34:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229101472] [2023-02-14 01:34:00,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:34:00,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 01:34:00,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:00,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 01:34:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:34:00,409 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) [2023-02-14 01:34:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:00,494 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2023-02-14 01:34:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 01:34:00,496 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 [2023-02-14 01:34:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:00,502 INFO L225 Difference]: With dead ends: 96 [2023-02-14 01:34:00,502 INFO L226 Difference]: Without dead ends: 46 [2023-02-14 01:34:00,505 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 [2023-02-14 01:34:00,510 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:00,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 85 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:34:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-14 01:34:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-02-14 01:34:00,540 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) [2023-02-14 01:34:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-02-14 01:34:00,544 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 44 [2023-02-14 01:34:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:00,545 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-02-14 01:34:00,545 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) [2023-02-14 01:34:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-02-14 01:34:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 01:34:00,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:00,548 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] [2023-02-14 01:34:00,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 01:34:00,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1439199646, now seen corresponding path program 1 times [2023-02-14 01:34:00,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:00,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508361312] [2023-02-14 01:34:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:00,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 01:34:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:34:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 01:34:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 01:34:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 01:34:00,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:00,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508361312] [2023-02-14 01:34:00,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508361312] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:34:00,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:34:00,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 01:34:00,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736930896] [2023-02-14 01:34:00,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:34:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 01:34:00,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:00,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 01:34:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:34:00,939 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2023-02-14 01:34:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:01,071 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2023-02-14 01:34:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 01:34:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 [2023-02-14 01:34:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:01,073 INFO L225 Difference]: With dead ends: 87 [2023-02-14 01:34:01,073 INFO L226 Difference]: Without dead ends: 71 [2023-02-14 01:34:01,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-14 01:34:01,074 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 36 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:01,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 210 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:34:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-14 01:34:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2023-02-14 01:34:01,080 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) [2023-02-14 01:34:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-02-14 01:34:01,081 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 44 [2023-02-14 01:34:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:01,082 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-02-14 01:34:01,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2023-02-14 01:34:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-02-14 01:34:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 01:34:01,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:01,083 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] [2023-02-14 01:34:01,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 01:34:01,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1012024996, now seen corresponding path program 1 times [2023-02-14 01:34:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:01,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990078036] [2023-02-14 01:34:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:01,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:01,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:01,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 01:34:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:01,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:34:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:01,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 01:34:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:01,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 01:34:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 01:34:01,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:01,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990078036] [2023-02-14 01:34:01,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990078036] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384585223] [2023-02-14 01:34:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:01,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:01,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:01,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:34:01,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 01:34:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 01:34:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 01:34:01,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 01:34:01,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384585223] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:34:01,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:34:01,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-02-14 01:34:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157034540] [2023-02-14 01:34:01,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:01,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 01:34:01,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 01:34:01,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-02-14 01:34:01,572 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) [2023-02-14 01:34:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:01,723 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-02-14 01:34:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 01:34:01,724 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 [2023-02-14 01:34:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:01,726 INFO L225 Difference]: With dead ends: 73 [2023-02-14 01:34:01,726 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 01:34:01,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-02-14 01:34:01,729 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:01,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 252 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:34:01,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 01:34:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-02-14 01:34:01,739 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) [2023-02-14 01:34:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-02-14 01:34:01,742 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 46 [2023-02-14 01:34:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:01,742 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-02-14 01:34:01,743 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) [2023-02-14 01:34:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-02-14 01:34:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 01:34:01,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:01,747 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] [2023-02-14 01:34:01,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 01:34:01,952 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 [2023-02-14 01:34:01,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1298139546, now seen corresponding path program 2 times [2023-02-14 01:34:01,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:01,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083327460] [2023-02-14 01:34:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:01,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:02,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:02,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 01:34:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:02,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:02,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:34:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:02,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 01:34:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:02,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-14 01:34:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 01:34:03,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:03,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083327460] [2023-02-14 01:34:03,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083327460] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:03,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764607587] [2023-02-14 01:34:03,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:34:03,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:03,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:34:03,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 01:34:03,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:34:03,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:34:03,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-14 01:34:03,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:03,590 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 16 treesize of output 12 [2023-02-14 01:34:03,693 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_123 Int) (downsweep_~left Int)) (and (= (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| (* |c_downsweep_#in~right| 4)))) (store (store .cse0 .cse1 v_ArrVal_123) (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)) (select .cse0 .cse1)))) |c_#memory_int|) (<= downsweep_~left |c_downsweep_#in~left|) (not (< (+ downsweep_~left 1) |c_downsweep_#in~right|)))) is different from true [2023-02-14 01:34:03,734 INFO L321 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-02-14 01:34:03,735 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 45 treesize of output 27 [2023-02-14 01:34:03,846 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-14 01:34:03,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-02-14 01:34:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 01:34:03,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:04,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764607587] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:04,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:34:04,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2023-02-14 01:34:04,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475944244] [2023-02-14 01:34:04,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 01:34:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 01:34:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=772, Unknown=1, NotChecked=56, Total=930 [2023-02-14 01:34:04,098 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-02-14 01:34:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:06,499 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2023-02-14 01:34:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 01:34:06,500 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 48 [2023-02-14 01:34:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:06,502 INFO L225 Difference]: With dead ends: 82 [2023-02-14 01:34:06,502 INFO L226 Difference]: Without dead ends: 80 [2023-02-14 01:34:06,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=356, Invalid=2197, Unknown=1, NotChecked=98, Total=2652 [2023-02-14 01:34:06,503 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 143 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:06,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 278 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 661 Invalid, 0 Unknown, 78 Unchecked, 0.7s Time] [2023-02-14 01:34:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-14 01:34:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2023-02-14 01:34:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2023-02-14 01:34:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2023-02-14 01:34:06,516 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 48 [2023-02-14 01:34:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:06,517 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2023-02-14 01:34:06,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-02-14 01:34:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2023-02-14 01:34:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 01:34:06,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:06,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:06,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 01:34:06,730 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,SelfDestructingSolverStorable3 [2023-02-14 01:34:06,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash 736701521, now seen corresponding path program 1 times [2023-02-14 01:34:06,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:06,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367545656] [2023-02-14 01:34:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:06,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:06,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:06,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 01:34:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:06,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:06,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:34:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:06,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 01:34:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:06,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-14 01:34:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 01:34:06,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:06,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367545656] [2023-02-14 01:34:06,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367545656] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:06,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396097703] [2023-02-14 01:34:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:06,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:06,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:06,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:34:06,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 01:34:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 115 conjunts are in the unsatisfiable core [2023-02-14 01:34:07,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:07,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:34:07,039 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 7 treesize of output 6 [2023-02-14 01:34:07,081 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 01:34:07,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 01:34:07,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 01:34:07,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-02-14 01:34:07,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-02-14 01:34:07,352 WARN L859 $PredicateComparison]: unable to prove that (exists ((upsweep_~right Int) (upsweep_~a.offset Int) (v_ArrVal_177 Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (<= upsweep_~right (+ |c_upsweep_#in~left| 1)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* upsweep_~right 4) upsweep_~a.offset) v_ArrVal_177))) (<= |c_upsweep_#in~a.offset| upsweep_~a.offset))) is different from true [2023-02-14 01:34:07,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2023-02-14 01:34:07,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2023-02-14 01:34:07,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 123 [2023-02-14 01:34:08,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 121 [2023-02-14 01:34:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 01:34:08,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:45,019 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 59 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:34:45,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396097703] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:45,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:34:45,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 28] total 35 [2023-02-14 01:34:45,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123454437] [2023-02-14 01:34:45,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:45,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 01:34:45,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 01:34:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1570, Unknown=13, NotChecked=80, Total=1806 [2023-02-14 01:34:45,022 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-02-14 01:34:47,548 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((upsweep_~right Int) (upsweep_~a.offset Int) (v_ArrVal_177 Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (<= upsweep_~right (+ |c_upsweep_#in~left| 1)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* upsweep_~right 4) upsweep_~a.offset) v_ArrVal_177))) (<= |c_upsweep_#in~a.offset| upsweep_~a.offset))) (exists ((|v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_1| Int)) (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_1|) 1))) is different from true [2023-02-14 01:34:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:49,380 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2023-02-14 01:34:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-14 01:34:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 52 [2023-02-14 01:34:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:49,381 INFO L225 Difference]: With dead ends: 133 [2023-02-14 01:34:49,382 INFO L226 Difference]: Without dead ends: 105 [2023-02-14 01:34:49,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=701, Invalid=5612, Unknown=15, NotChecked=314, Total=6642 [2023-02-14 01:34:49,384 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:49,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 244 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1185 Invalid, 0 Unknown, 136 Unchecked, 1.1s Time] [2023-02-14 01:34:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-14 01:34:49,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2023-02-14 01:34:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2023-02-14 01:34:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2023-02-14 01:34:49,397 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 52 [2023-02-14 01:34:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:49,397 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2023-02-14 01:34:49,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-02-14 01:34:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2023-02-14 01:34:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 01:34:49,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:49,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2023-02-14 01:34:49,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 01:34:49,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:49,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:49,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash -362686961, now seen corresponding path program 2 times [2023-02-14 01:34:49,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245580012] [2023-02-14 01:34:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:49,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:49,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:49,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 01:34:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:49,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:49,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:34:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:49,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-14 01:34:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:49,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-14 01:34:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 01:34:49,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:49,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245580012] [2023-02-14 01:34:49,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245580012] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:49,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421100876] [2023-02-14 01:34:49,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:34:49,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:49,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:49,751 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:34:49,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 01:34:49,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:34:49,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:34:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 01:34:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 01:34:49,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 01:34:49,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421100876] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:34:49,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:34:49,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2023-02-14 01:34:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019774975] [2023-02-14 01:34:50,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:50,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 01:34:50,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:50,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 01:34:50,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-14 01:34:50,003 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-14 01:34:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:50,215 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2023-02-14 01:34:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 01:34:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2023-02-14 01:34:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:50,217 INFO L225 Difference]: With dead ends: 113 [2023-02-14 01:34:50,217 INFO L226 Difference]: Without dead ends: 93 [2023-02-14 01:34:50,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-02-14 01:34:50,218 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:50,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 331 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:34:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-14 01:34:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2023-02-14 01:34:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 63 states have internal predecessors, (69), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-14 01:34:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2023-02-14 01:34:50,232 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 54 [2023-02-14 01:34:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:50,232 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2023-02-14 01:34:50,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-14 01:34:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2023-02-14 01:34:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 01:34:50,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:50,233 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:50,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 01:34:50,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:50,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1333958502, now seen corresponding path program 1 times [2023-02-14 01:34:50,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:50,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451080258] [2023-02-14 01:34:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:50,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:50,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:50,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 01:34:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:50,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 01:34:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:50,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 01:34:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:50,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-14 01:34:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:50,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-14 01:34:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 01:34:50,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:50,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451080258] [2023-02-14 01:34:50,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451080258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:50,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096853731] [2023-02-14 01:34:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:50,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:50,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:50,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:34:50,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 01:34:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 01:34:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 01:34:50,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 01:34:50,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096853731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:34:50,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:34:50,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-02-14 01:34:50,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513197688] [2023-02-14 01:34:50,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:50,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 01:34:50,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:50,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 01:34:50,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-02-14 01:34:50,847 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:34:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:51,020 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2023-02-14 01:34:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 01:34:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2023-02-14 01:34:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:51,021 INFO L225 Difference]: With dead ends: 122 [2023-02-14 01:34:51,022 INFO L226 Difference]: Without dead ends: 100 [2023-02-14 01:34:51,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-02-14 01:34:51,022 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 68 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:51,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 267 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:34:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-14 01:34:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2023-02-14 01:34:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 61 states have internal predecessors, (68), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2023-02-14 01:34:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2023-02-14 01:34:51,033 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 57 [2023-02-14 01:34:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:51,034 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2023-02-14 01:34:51,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:34:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2023-02-14 01:34:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-14 01:34:51,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:51,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:51,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 01:34:51,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:51,239 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1099509749, now seen corresponding path program 1 times [2023-02-14 01:34:51,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:51,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732079762] [2023-02-14 01:34:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:51,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 01:34:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 01:34:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 01:34:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-14 01:34:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:34:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-14 01:34:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 01:34:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:51,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732079762] [2023-02-14 01:34:51,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732079762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512124000] [2023-02-14 01:34:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:51,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:51,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:51,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:34:51,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 01:34:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 01:34:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 01:34:51,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 01:34:51,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512124000] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:34:51,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:34:51,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2023-02-14 01:34:51,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971558973] [2023-02-14 01:34:51,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 01:34:51,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 01:34:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-02-14 01:34:51,766 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2023-02-14 01:34:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:51,898 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2023-02-14 01:34:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 01:34:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 65 [2023-02-14 01:34:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:51,899 INFO L225 Difference]: With dead ends: 93 [2023-02-14 01:34:51,899 INFO L226 Difference]: Without dead ends: 70 [2023-02-14 01:34:51,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-02-14 01:34:51,900 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:51,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 219 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:34:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-14 01:34:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2023-02-14 01:34:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-02-14 01:34:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-14 01:34:51,907 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 65 [2023-02-14 01:34:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:51,907 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-14 01:34:51,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2023-02-14 01:34:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-14 01:34:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 01:34:51,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:51,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-02-14 01:34:51,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 01:34:52,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:52,113 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:52,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1124650442, now seen corresponding path program 1 times [2023-02-14 01:34:52,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:52,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884067432] [2023-02-14 01:34:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:52,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 01:34:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:34:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-14 01:34:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:34:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-14 01:34:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 01:34:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-14 01:34:52,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:52,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884067432] [2023-02-14 01:34:52,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884067432] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:52,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767377583] [2023-02-14 01:34:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:52,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:52,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:34:52,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 01:34:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 176 conjunts are in the unsatisfiable core [2023-02-14 01:34:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:52,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:34:52,614 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 7 treesize of output 6 [2023-02-14 01:34:52,673 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 01:34:52,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 01:34:52,694 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_417 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_417) |c_#memory_int|)) is different from true [2023-02-14 01:34:52,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-02-14 01:34:52,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-02-14 01:34:52,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-02-14 01:34:52,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-02-14 01:34:52,921 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_421 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_421)) |c_#memory_int|)) is different from true [2023-02-14 01:34:52,972 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_423 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_423)) |c_#memory_int|)) is different from true [2023-02-14 01:34:53,022 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_421 Int) (v_ArrVal_426 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ |c_upsweep_#in~a.offset| (* 4 |c_upsweep_#in~left|)) v_ArrVal_421) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_426)) |c_#memory_int|)) is different from true [2023-02-14 01:34:53,030 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 0 case distinctions, treesize of input 33 treesize of output 28 [2023-02-14 01:34:53,078 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 0 case distinctions, treesize of input 41 treesize of output 36 [2023-02-14 01:34:53,222 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_432 Int) (downsweep_~left Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 v_ArrVal_432)))) (<= downsweep_~left |c_downsweep_#in~left|))) is different from true [2023-02-14 01:34:53,321 WARN L859 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int) (downsweep_~right Int) (v_ArrVal_437 Int) (downsweep_~a.offset Int) (v_ArrVal_435 Int)) (and (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (store (store (select |c_old(#memory_int)| |c_downsweep_#in~a.base|) (+ downsweep_~a.offset (* downsweep_~right 4)) v_ArrVal_435) (+ downsweep_~a.offset (* downsweep_~left 4)) v_ArrVal_437)) |c_#memory_int|) (<= |c_downsweep_#in~right| downsweep_~right) (<= |c_downsweep_#in~left| downsweep_~left) (<= |c_downsweep_#in~a.offset| downsweep_~a.offset))) is different from true [2023-02-14 01:34:55,623 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 0 case distinctions, treesize of input 156 treesize of output 145 [2023-02-14 01:34:56,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 141 [2023-02-14 01:34:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 17 not checked. [2023-02-14 01:34:56,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:57,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767377583] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:57,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:34:57,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 37] total 46 [2023-02-14 01:34:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775290407] [2023-02-14 01:34:57,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:57,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 01:34:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 01:34:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1769, Unknown=7, NotChecked=534, Total=2450 [2023-02-14 01:34:57,157 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) [2023-02-14 01:35:01,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:35:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:08,655 INFO L93 Difference]: Finished difference Result 137 states and 183 transitions. [2023-02-14 01:35:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-14 01:35:08,656 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) Word has length 72 [2023-02-14 01:35:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:08,657 INFO L225 Difference]: With dead ends: 137 [2023-02-14 01:35:08,657 INFO L226 Difference]: Without dead ends: 109 [2023-02-14 01:35:08,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=725, Invalid=7121, Unknown=10, NotChecked=1074, Total=8930 [2023-02-14 01:35:08,659 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 226 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 137 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 682 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:08,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 432 Invalid, 2556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1736 Invalid, 1 Unknown, 682 Unchecked, 4.5s Time] [2023-02-14 01:35:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-14 01:35:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2023-02-14 01:35:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 62 states have internal predecessors, (67), 17 states have call successors, (17), 4 states have call predecessors, (17), 8 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) [2023-02-14 01:35:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2023-02-14 01:35:08,686 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 72 [2023-02-14 01:35:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:08,686 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2023-02-14 01:35:08,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) [2023-02-14 01:35:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2023-02-14 01:35:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-14 01:35:08,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:08,687 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-02-14 01:35:08,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:08,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:08,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1763257480, now seen corresponding path program 2 times [2023-02-14 01:35:08,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757887842] [2023-02-14 01:35:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:14,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:14,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 01:35:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:35:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:14,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:35:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:14,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 01:35:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:15,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:15,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-14 01:35:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat