./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ss2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ss2.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 e3a2069d11be89fa2c8e98300820eccf9d61bcc6c7ca5fd30afcaf42942b8548 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:16:56,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:16:56,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:16:56,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:16:56,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:16:56,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:16:56,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:16:56,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:16:56,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:16:56,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:16:56,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:16:56,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:16:56,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:16:56,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:16:56,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:16:56,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:16:56,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:16:56,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:16:56,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:16:56,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:16:56,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:16:56,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:16:56,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:16:56,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:16:56,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:16:56,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:16:56,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:16:56,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:16:56,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:16:56,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:16:56,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:16:56,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:16:56,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:16:56,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:16:56,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:16:56,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:16:56,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:16:56,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:16:56,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:16:56,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:16:56,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:16:56,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:16:56,798 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:16:56,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:16:56,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:16:56,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:16:56,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:16:56,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:16:56,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:16:56,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:16:56,801 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:16:56,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:16:56,802 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:16:56,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:16:56,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:16:56,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:16:56,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:16:56,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:16:56,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:16:56,803 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:16:56,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:16:56,803 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:16:56,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:16:56,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:16:56,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:16:56,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:16:56,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:16:56,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:16:56,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:16:56,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:16:56,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:16:56,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:16:56,805 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:16:56,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:16:56,805 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:16:56,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:16:56,806 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:16:56,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3a2069d11be89fa2c8e98300820eccf9d61bcc6c7ca5fd30afcaf42942b8548 [2023-02-15 10:16:57,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:16:57,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:16:57,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:16:57,051 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:16:57,051 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:16:57,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ss2.c [2023-02-15 10:16:57,999 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:16:58,126 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:16:58,126 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss2.c [2023-02-15 10:16:58,130 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46bb42c4b/c24d082e53034c7b92302b7de0a2ac85/FLAGd11e149c9 [2023-02-15 10:16:58,139 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46bb42c4b/c24d082e53034c7b92302b7de0a2ac85 [2023-02-15 10:16:58,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:16:58,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:16:58,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:16:58,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:16:58,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:16:58,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6082eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58, skipping insertion in model container [2023-02-15 10:16:58,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:16:58,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:16:58,281 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss2.c[586,599] [2023-02-15 10:16:58,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:16:58,300 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:16:58,307 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss2.c[586,599] [2023-02-15 10:16:58,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:16:58,323 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:16:58,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58 WrapperNode [2023-02-15 10:16:58,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:16:58,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:16:58,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:16:58,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:16:58,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,347 INFO L138 Inliner]: procedures = 17, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2023-02-15 10:16:58,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:16:58,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:16:58,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:16:58,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:16:58,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,365 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:16:58,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:16:58,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:16:58,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:16:58,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (1/1) ... [2023-02-15 10:16:58,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:16:58,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:16:58,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 10:16:58,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 10:16:58,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:16:58,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:16:58,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 10:16:58,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:16:58,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:16:58,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:16:58,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:16:58,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:16:58,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 10:16:58,489 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:16:58,491 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:16:58,685 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:16:58,688 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:16:58,688 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2023-02-15 10:16:58,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:16:58 BoogieIcfgContainer [2023-02-15 10:16:58,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:16:58,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:16:58,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:16:58,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:16:58,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:16:58" (1/3) ... [2023-02-15 10:16:58,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3184d706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:16:58, skipping insertion in model container [2023-02-15 10:16:58,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:16:58" (2/3) ... [2023-02-15 10:16:58,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3184d706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:16:58, skipping insertion in model container [2023-02-15 10:16:58,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:16:58" (3/3) ... [2023-02-15 10:16:58,695 INFO L112 eAbstractionObserver]: Analyzing ICFG ss2.c [2023-02-15 10:16:58,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:16:58,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:16:58,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:16:58,743 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;@43651994, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:16:58,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:16:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:16:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 10:16:58,749 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:16:58,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:16:58,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:16:58,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:16:58,753 INFO L85 PathProgramCache]: Analyzing trace with hash -642180410, now seen corresponding path program 1 times [2023-02-15 10:16:58,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:16:58,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938471678] [2023-02-15 10:16:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:16:58,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:16:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:16:58,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:16:58,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938471678] [2023-02-15 10:16:58,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 10:16:58,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050255068] [2023-02-15 10:16:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:16:58,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:16:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:16:58,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:16:58,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:16:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:16:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 10:16:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:16:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:16:58,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:16:58,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050255068] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:16:58,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:16:58,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:16:58,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792099859] [2023-02-15 10:16:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:16:58,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:16:58,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:16:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:16:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:16:59,005 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:16:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:16:59,024 INFO L93 Difference]: Finished difference Result 62 states and 92 transitions. [2023-02-15 10:16:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:16:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 10:16:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:16:59,038 INFO L225 Difference]: With dead ends: 62 [2023-02-15 10:16:59,038 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 10:16:59,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:16:59,048 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:16:59,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:16:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 10:16:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 10:16:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:16:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-15 10:16:59,083 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2023-02-15 10:16:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:16:59,083 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-15 10:16:59,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:16:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-15 10:16:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 10:16:59,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:16:59,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:16:59,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 10:16:59,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 10:16:59,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:16:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:16:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1011332042, now seen corresponding path program 1 times [2023-02-15 10:16:59,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:16:59,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879760048] [2023-02-15 10:16:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:16:59,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:16:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:16:59,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:16:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879760048] [2023-02-15 10:16:59,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 10:16:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073557196] [2023-02-15 10:16:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:16:59,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:16:59,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:16:59,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:16:59,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:16:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:16:59,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 10:16:59,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:16:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:16:59,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:16:59,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073557196] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:16:59,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:16:59,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:16:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207207649] [2023-02-15 10:16:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:16:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:16:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:16:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:16:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:16:59,550 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:16:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:16:59,601 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2023-02-15 10:16:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:16:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 10:16:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:16:59,602 INFO L225 Difference]: With dead ends: 69 [2023-02-15 10:16:59,602 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 10:16:59,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:16:59,603 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:16:59,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 19 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:16:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 10:16:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-02-15 10:16:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:16:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-15 10:16:59,609 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2023-02-15 10:16:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:16:59,609 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-15 10:16:59,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:16:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-15 10:16:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 10:16:59,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:16:59,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:16:59,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 10:16:59,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 10:16:59,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:16:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:16:59,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1890076394, now seen corresponding path program 1 times [2023-02-15 10:16:59,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:16:59,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351806002] [2023-02-15 10:16:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:16:59,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:16:59,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:16:59,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311746330] [2023-02-15 10:16:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:16:59,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:16:59,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:16:59,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:16:59,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:16:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:16:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-15 10:16:59,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:16:59,990 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 11 treesize of output 7 [2023-02-15 10:17:00,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:00,011 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 19 treesize of output 18 [2023-02-15 10:17:00,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:00,071 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 23 [2023-02-15 10:17:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:00,131 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 30 treesize of output 21 [2023-02-15 10:17:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:00,201 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 23 [2023-02-15 10:17:00,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:00,258 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 40 treesize of output 23 [2023-02-15 10:17:00,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:00,353 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:00,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2023-02-15 10:17:00,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:00,521 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 51 treesize of output 35 [2023-02-15 10:17:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:17:00,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:17:01,933 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:17:02,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:17:02,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351806002] [2023-02-15 10:17:02,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:17:02,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311746330] [2023-02-15 10:17:02,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311746330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:17:02,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:17:02,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2023-02-15 10:17:02,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653925676] [2023-02-15 10:17:02,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:17:02,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 10:17:02,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:17:02,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 10:17:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 10:17:02,064 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:17:06,751 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2023-02-15 10:17:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 10:17:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-15 10:17:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:17:06,754 INFO L225 Difference]: With dead ends: 99 [2023-02-15 10:17:06,754 INFO L226 Difference]: Without dead ends: 97 [2023-02-15 10:17:06,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=511, Invalid=3271, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 10:17:06,756 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 151 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:17:06,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 225 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 10:17:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-15 10:17:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2023-02-15 10:17:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-02-15 10:17:06,767 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 32 [2023-02-15 10:17:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:17:06,771 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-02-15 10:17:06,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-02-15 10:17:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 10:17:06,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:17:06,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:17:06,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 10:17:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:17:06,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:17:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:17:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1237633832, now seen corresponding path program 2 times [2023-02-15 10:17:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:17:06,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594524647] [2023-02-15 10:17:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:17:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:17:07,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:17:07,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559268297] [2023-02-15 10:17:07,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:17:07,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:17:07,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:17:07,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:17:07,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:17:07,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:17:07,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:17:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 10:17:07,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:17:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:17:07,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:17:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:17:07,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:17:07,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594524647] [2023-02-15 10:17:07,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:17:07,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559268297] [2023-02-15 10:17:07,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559268297] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:17:07,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:17:07,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 10:17:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557453607] [2023-02-15 10:17:07,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:17:07,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:17:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:17:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:17:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:17:07,177 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:17:07,317 INFO L93 Difference]: Finished difference Result 156 states and 186 transitions. [2023-02-15 10:17:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:17:07,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-15 10:17:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:17:07,319 INFO L225 Difference]: With dead ends: 156 [2023-02-15 10:17:07,319 INFO L226 Difference]: Without dead ends: 85 [2023-02-15 10:17:07,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:17:07,320 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:17:07,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 50 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:17:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-15 10:17:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2023-02-15 10:17:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2023-02-15 10:17:07,327 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 34 [2023-02-15 10:17:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:17:07,328 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2023-02-15 10:17:07,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2023-02-15 10:17:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 10:17:07,329 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:17:07,329 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 10:17:07,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:17:07,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:17:07,534 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:17:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:17:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash 999316006, now seen corresponding path program 3 times [2023-02-15 10:17:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:17:07,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076917875] [2023-02-15 10:17:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:17:07,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:17:07,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:17:07,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593735114] [2023-02-15 10:17:07,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:17:07,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:17:07,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:17:07,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:17:07,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:17:07,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 10:17:07,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:17:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 10:17:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:17:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 10:17:07,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:17:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 10:17:07,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:17:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076917875] [2023-02-15 10:17:07,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:17:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593735114] [2023-02-15 10:17:07,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593735114] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:17:07,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:17:07,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 10:17:07,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384451098] [2023-02-15 10:17:07,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:17:07,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:17:07,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:17:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:17:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:17:07,766 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:17:07,905 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2023-02-15 10:17:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:17:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-15 10:17:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:17:07,908 INFO L225 Difference]: With dead ends: 81 [2023-02-15 10:17:07,909 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 10:17:07,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-15 10:17:07,915 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:17:07,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 40 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:17:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 10:17:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2023-02-15 10:17:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-02-15 10:17:07,932 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 36 [2023-02-15 10:17:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:17:07,933 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-02-15 10:17:07,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:17:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-02-15 10:17:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 10:17:07,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:17:07,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:17:07,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 10:17:08,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:17:08,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:17:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:17:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash 772187038, now seen corresponding path program 4 times [2023-02-15 10:17:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:17:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186534378] [2023-02-15 10:17:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:17:08,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:17:08,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:17:08,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678824443] [2023-02-15 10:17:08,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 10:17:08,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:17:08,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:17:08,190 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) [2023-02-15 10:17:08,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 10:17:08,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 10:17:08,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:17:08,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-15 10:17:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:17:08,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 10:17:08,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:17:08,345 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 23 treesize of output 22 [2023-02-15 10:17:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:08,402 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:08,404 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:17:08,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2023-02-15 10:17:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:08,542 INFO L321 Elim1Store]: treesize reduction 96, result has 19.3 percent of original size [2023-02-15 10:17:08,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 49 treesize of output 50 [2023-02-15 10:17:08,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:08,612 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-02-15 10:17:08,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 58 [2023-02-15 10:17:08,879 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:08,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:08,881 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:08,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:08,883 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:08,893 INFO L321 Elim1Store]: treesize reduction 35, result has 23.9 percent of original size [2023-02-15 10:17:08,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 58 treesize of output 72 [2023-02-15 10:17:09,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:09,032 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:09,036 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-02-15 10:17:09,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 49 [2023-02-15 10:17:09,135 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:09,148 INFO L321 Elim1Store]: treesize reduction 30, result has 33.3 percent of original size [2023-02-15 10:17:09,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 55 [2023-02-15 10:17:09,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:09,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2023-02-15 10:17:09,344 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:09,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:09,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2023-02-15 10:17:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:09,438 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-02-15 10:17:09,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 37 [2023-02-15 10:17:09,555 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:17:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:09,569 INFO L321 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2023-02-15 10:17:09,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 53 [2023-02-15 10:17:09,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:17:09,662 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:17:09,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 33 [2023-02-15 10:17:09,762 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:17:09,762 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 51 treesize of output 39 [2023-02-15 10:17:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:17:09,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:17:34,321 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_110| Int) (~N~0 Int)) (or (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)) (= (let ((.cse6 (let ((.cse14 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14))) (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (let ((.cse13 (* 8 |v_ULTIMATE.start_main_~i~0#1_110|))) (let ((.cse11 (select .cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse13))) (.cse12 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse11 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset| .cse13)) .cse12))))))))) (.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (store (store (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| 0) .cse5 0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse7 (store .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| .cse4))) (store .cse7 .cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse7) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse3 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3 .cse4)))))))) (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (not (< (+ |v_ULTIMATE.start_main_~i~0#1_110| 1) ~N~0)) (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_110|) ~N~0))) is different from false [2023-02-15 10:17:36,585 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_110| Int) (~N~0 Int)) (or (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)) (not (< (+ |v_ULTIMATE.start_main_~i~0#1_110| 1) ~N~0)) (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (let ((.cse6 (let ((.cse14 (let ((.cse15 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse15 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse15 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14))) (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (let ((.cse13 (* 8 |v_ULTIMATE.start_main_~i~0#1_110|))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse12 (select .cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse13)))) (+ .cse11 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset| .cse13)) .cse12))))))))) (.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (store (store (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| 0) .cse5 0))) (let ((.cse3 (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse7 (store .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| .cse3))) (store .cse7 .cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse7) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse4 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2 .cse3 .cse4))))))))) (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_110|) ~N~0))) is different from false [2023-02-15 10:17:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-02-15 10:17:36,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:17:36,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186534378] [2023-02-15 10:17:36,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:17:36,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678824443] [2023-02-15 10:17:36,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678824443] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:17:36,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:17:36,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2023-02-15 10:17:36,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381260343] [2023-02-15 10:17:36,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:17:36,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 10:17:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:17:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 10:17:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3033, Unknown=2, NotChecked=226, Total=3540 [2023-02-15 10:17:36,631 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 60 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 60 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:19:53,066 WARN L233 SmtUtils]: Spent 11.56s on a formula simplification that was a NOOP. DAG size: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:20:00,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:20:05,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:20:06,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:20:09,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:20:11,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:07,071 WARN L233 SmtUtils]: Spent 16.84s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:21:11,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:13,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:18,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:20,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-02-15 10:21:22,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:24,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:26,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:28,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:30,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:34,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:37,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:21:38,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1]