./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-16 23:49:33,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 23:49:33,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 23:49:33,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 23:49:33,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 23:49:33,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 23:49:33,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 23:49:33,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 23:49:33,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 23:49:33,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 23:49:33,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 23:49:33,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 23:49:33,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 23:49:33,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 23:49:33,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 23:49:33,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 23:49:33,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 23:49:33,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 23:49:33,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 23:49:33,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 23:49:33,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 23:49:33,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 23:49:33,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 23:49:33,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 23:49:33,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 23:49:33,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 23:49:33,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 23:49:33,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 23:49:33,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 23:49:33,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 23:49:33,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 23:49:33,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 23:49:33,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 23:49:33,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 23:49:33,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 23:49:33,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 23:49:33,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 23:49:33,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 23:49:33,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 23:49:33,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 23:49:33,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 23:49:33,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 23:49:33,593 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 23:49:33,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 23:49:33,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 23:49:33,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 23:49:33,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 23:49:33,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 23:49:33,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 23:49:33,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 23:49:33,595 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 23:49:33,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 23:49:33,596 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 23:49:33,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 23:49:33,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 23:49:33,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 23:49:33,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 23:49:33,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 23:49:33,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 23:49:33,597 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 23:49:33,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 23:49:33,598 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 23:49:33,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 23:49:33,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 23:49:33,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 23:49:33,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 23:49:33,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:49:33,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 23:49:33,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 23:49:33,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 23:49:33,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 23:49:33,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 23:49:33,599 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 23:49:33,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 23:49:33,600 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 23:49:33,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 23:49:33,600 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 23:49:33,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2023-02-16 23:49:33,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 23:49:33,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 23:49:33,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 23:49:33,784 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 23:49:33,784 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 23:49:33,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-16 23:49:34,755 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 23:49:34,921 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 23:49:34,921 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-16 23:49:34,925 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff69ced8/6127e9c6b0b94d58aaf626f8b259c74d/FLAG91e175adf [2023-02-16 23:49:34,934 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff69ced8/6127e9c6b0b94d58aaf626f8b259c74d [2023-02-16 23:49:34,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 23:49:34,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 23:49:34,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 23:49:34,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 23:49:34,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 23:49:34,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:49:34" (1/1) ... [2023-02-16 23:49:34,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68327a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:34, skipping insertion in model container [2023-02-16 23:49:34,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:49:34" (1/1) ... [2023-02-16 23:49:34,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 23:49:34,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 23:49:35,066 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-02-16 23:49:35,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:49:35,093 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 23:49:35,104 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-02-16 23:49:35,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:49:35,128 INFO L208 MainTranslator]: Completed translation [2023-02-16 23:49:35,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35 WrapperNode [2023-02-16 23:49:35,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 23:49:35,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 23:49:35,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 23:49:35,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 23:49:35,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,165 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-02-16 23:49:35,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 23:49:35,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 23:49:35,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 23:49:35,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 23:49:35,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 23:49:35,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 23:49:35,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 23:49:35,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 23:49:35,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (1/1) ... [2023-02-16 23:49:35,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:49:35,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:35,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 23:49:35,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 23:49:35,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 23:49:35,262 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-16 23:49:35,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-16 23:49:35,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 23:49:35,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 23:49:35,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 23:49:35,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 23:49:35,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 23:49:35,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 23:49:35,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 23:49:35,318 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 23:49:35,320 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 23:49:35,450 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 23:49:35,453 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 23:49:35,454 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 23:49:35,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:49:35 BoogieIcfgContainer [2023-02-16 23:49:35,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 23:49:35,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 23:49:35,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 23:49:35,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 23:49:35,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 11:49:34" (1/3) ... [2023-02-16 23:49:35,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d98f635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:49:35, skipping insertion in model container [2023-02-16 23:49:35,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:49:35" (2/3) ... [2023-02-16 23:49:35,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d98f635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:49:35, skipping insertion in model container [2023-02-16 23:49:35,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:49:35" (3/3) ... [2023-02-16 23:49:35,461 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2023-02-16 23:49:35,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 23:49:35,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 23:49:35,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 23:49:35,525 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;@696230b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 23:49:35,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 23:49:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:49:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 23:49:35,533 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:35,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:49:35,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2023-02-16 23:49:35,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:35,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216746788] [2023-02-16 23:49:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:35,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:35,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:35,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 23:49:35,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:35,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216746788] [2023-02-16 23:49:35,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216746788] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:49:35,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:49:35,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 23:49:35,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583082051] [2023-02-16 23:49:35,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:49:35,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 23:49:35,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 23:49:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 23:49:35,860 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 23:49:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:35,919 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2023-02-16 23:49:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 23:49:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-16 23:49:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:35,925 INFO L225 Difference]: With dead ends: 64 [2023-02-16 23:49:35,926 INFO L226 Difference]: Without dead ends: 27 [2023-02-16 23:49:35,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:49:35,933 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:35,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:49:35,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-16 23:49:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-16 23:49:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:49:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-16 23:49:35,973 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2023-02-16 23:49:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:35,977 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-16 23:49:35,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 23:49:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-16 23:49:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 23:49:35,980 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:35,980 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:49:35,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 23:49:35,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2023-02-16 23:49:35,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:35,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478408091] [2023-02-16 23:49:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:35,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:36,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:36,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 23:49:36,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:36,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478408091] [2023-02-16 23:49:36,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478408091] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:49:36,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:49:36,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 23:49:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277532664] [2023-02-16 23:49:36,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:49:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 23:49:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 23:49:36,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:49:36,100 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 23:49:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:36,158 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-02-16 23:49:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 23:49:36,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-16 23:49:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:36,159 INFO L225 Difference]: With dead ends: 50 [2023-02-16 23:49:36,160 INFO L226 Difference]: Without dead ends: 36 [2023-02-16 23:49:36,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:49:36,162 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:36,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:49:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-16 23:49:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-02-16 23:49:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:49:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-16 23:49:36,172 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2023-02-16 23:49:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:36,173 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-16 23:49:36,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 23:49:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-16 23:49:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-16 23:49:36,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:36,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:49:36,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 23:49:36,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:36,175 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2023-02-16 23:49:36,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:36,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930164697] [2023-02-16 23:49:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:36,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:36,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:36,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:36,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:49:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 23:49:36,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930164697] [2023-02-16 23:49:36,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930164697] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655544327] [2023-02-16 23:49:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:36,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:36,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:36,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:49:36,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 23:49:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:36,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-16 23:49:36,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:49:36,890 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:49:36,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:49:36,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 50 [2023-02-16 23:49:37,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:49:37,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 66 [2023-02-16 23:49:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 23:49:37,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:49:37,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:49:37,119 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 22 treesize of output 23 [2023-02-16 23:49:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 23:49:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655544327] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:49:37,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:49:37,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-02-16 23:49:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290133177] [2023-02-16 23:49:37,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:49:37,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 23:49:37,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:37,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 23:49:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-02-16 23:49:37,141 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 23:49:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:37,316 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-16 23:49:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 23:49:37,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-16 23:49:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:37,319 INFO L225 Difference]: With dead ends: 54 [2023-02-16 23:49:37,319 INFO L226 Difference]: Without dead ends: 50 [2023-02-16 23:49:37,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-02-16 23:49:37,323 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:37,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 159 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:49:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-16 23:49:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-16 23:49:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 23:49:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-16 23:49:37,340 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-16 23:49:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:37,341 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-16 23:49:37,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 23:49:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-16 23:49:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-16 23:49:37,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:37,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:49:37,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 23:49:37,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:37,549 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2023-02-16 23:49:37,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:37,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422018487] [2023-02-16 23:49:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:37,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:37,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:37,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:37,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:49:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 23:49:37,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:37,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422018487] [2023-02-16 23:49:37,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422018487] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:37,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005136950] [2023-02-16 23:49:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:37,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:37,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:49:37,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 23:49:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:37,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 23:49:37,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:49:37,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:49:37,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:49:37,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 50 [2023-02-16 23:49:37,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:49:37,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 66 [2023-02-16 23:49:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 23:49:37,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:49:38,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:49:38,034 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 22 treesize of output 23 [2023-02-16 23:49:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 23:49:38,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005136950] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:49:38,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:49:38,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2023-02-16 23:49:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676746509] [2023-02-16 23:49:38,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:49:38,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 23:49:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 23:49:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-02-16 23:49:38,052 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 23:49:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:38,263 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-02-16 23:49:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 23:49:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-16 23:49:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:38,267 INFO L225 Difference]: With dead ends: 68 [2023-02-16 23:49:38,267 INFO L226 Difference]: Without dead ends: 64 [2023-02-16 23:49:38,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-02-16 23:49:38,268 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:38,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 23:49:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-16 23:49:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2023-02-16 23:49:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 23:49:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-16 23:49:38,275 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-16 23:49:38,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:38,276 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-16 23:49:38,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 23:49:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-16 23:49:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 23:49:38,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:38,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-02-16 23:49:38,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 23:49:38,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-16 23:49:38,477 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2023-02-16 23:49:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:38,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626261082] [2023-02-16 23:49:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:38,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:38,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:38,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:49:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 23:49:38,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626261082] [2023-02-16 23:49:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626261082] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537691641] [2023-02-16 23:49:38,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:49:38,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:38,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:38,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:49:38,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 23:49:38,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:49:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:49:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:49:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:49:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 23:49:38,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:49:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 23:49:38,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537691641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:49:38,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:49:38,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-16 23:49:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766626586] [2023-02-16 23:49:38,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:49:38,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 23:49:38,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 23:49:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-16 23:49:38,625 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-16 23:49:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:38,691 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2023-02-16 23:49:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 23:49:38,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2023-02-16 23:49:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:38,692 INFO L225 Difference]: With dead ends: 88 [2023-02-16 23:49:38,693 INFO L226 Difference]: Without dead ends: 69 [2023-02-16 23:49:38,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-16 23:49:38,693 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:38,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 83 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:49:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-16 23:49:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2023-02-16 23:49:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 23:49:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-16 23:49:38,709 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2023-02-16 23:49:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:38,710 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-16 23:49:38,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-16 23:49:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-16 23:49:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 23:49:38,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:38,721 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-02-16 23:49:38,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 23:49:38,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:38,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2023-02-16 23:49:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910147001] [2023-02-16 23:49:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:38,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:38,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:49:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:38,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:49:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 23:49:39,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:39,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910147001] [2023-02-16 23:49:39,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910147001] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:39,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180340794] [2023-02-16 23:49:39,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:49:39,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:39,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:39,009 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) [2023-02-16 23:49:39,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 23:49:39,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 23:49:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:49:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:49:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:49:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 23:49:39,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:49:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 23:49:39,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180340794] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:49:39,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:49:39,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-16 23:49:39,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107579173] [2023-02-16 23:49:39,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:49:39,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 23:49:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 23:49:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-16 23:49:39,101 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-16 23:49:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:39,191 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-02-16 23:49:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 23:49:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2023-02-16 23:49:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:39,192 INFO L225 Difference]: With dead ends: 59 [2023-02-16 23:49:39,192 INFO L226 Difference]: Without dead ends: 51 [2023-02-16 23:49:39,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-16 23:49:39,193 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:39,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:49:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-16 23:49:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-02-16 23:49:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 23:49:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-02-16 23:49:39,197 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2023-02-16 23:49:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:39,197 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-02-16 23:49:39,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-16 23:49:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-02-16 23:49:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-16 23:49:39,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:39,198 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-02-16 23:49:39,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 23:49:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:39,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2023-02-16 23:49:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:39,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814343375] [2023-02-16 23:49:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:39,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:40,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:40,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:49:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:40,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:49:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 23:49:40,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:40,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814343375] [2023-02-16 23:49:40,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814343375] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:40,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711211656] [2023-02-16 23:49:40,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 23:49:40,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:40,050 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) [2023-02-16 23:49:40,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 23:49:40,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 23:49:40,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:49:40,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-16 23:49:40,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:49:40,117 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 [2023-02-16 23:49:40,258 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:49:40,260 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2023-02-16 23:49:40,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 64 [2023-02-16 23:49:40,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 30 [2023-02-16 23:49:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:49:40,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:49:41,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711211656] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:41,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:49:41,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-02-16 23:49:41,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956940697] [2023-02-16 23:49:41,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:49:41,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-16 23:49:41,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:41,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-16 23:49:41,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1864, Unknown=0, NotChecked=0, Total=2070 [2023-02-16 23:49:41,388 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:49:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:42,921 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2023-02-16 23:49:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 23:49:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-16 23:49:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:42,922 INFO L225 Difference]: With dead ends: 93 [2023-02-16 23:49:42,922 INFO L226 Difference]: Without dead ends: 89 [2023-02-16 23:49:42,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=739, Invalid=4517, Unknown=0, NotChecked=0, Total=5256 [2023-02-16 23:49:42,925 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:42,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 307 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 23:49:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-16 23:49:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2023-02-16 23:49:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 23:49:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2023-02-16 23:49:42,937 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 50 [2023-02-16 23:49:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:42,939 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2023-02-16 23:49:42,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:49:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2023-02-16 23:49:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-16 23:49:42,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:42,941 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-02-16 23:49:42,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 23:49:43,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:43,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2023-02-16 23:49:43,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:43,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893838684] [2023-02-16 23:49:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:43,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:43,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:43,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:49:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:43,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:49:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 23:49:43,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893838684] [2023-02-16 23:49:43,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893838684] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:43,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581411306] [2023-02-16 23:49:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:43,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:43,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:43,665 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) [2023-02-16 23:49:43,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 23:49:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:43,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-16 23:49:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:49:43,736 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 [2023-02-16 23:49:43,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:49:43,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:49:43,903 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-02-16 23:49:43,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 73 [2023-02-16 23:49:44,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 39 [2023-02-16 23:49:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:49:44,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:49:46,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581411306] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:46,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:49:46,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2023-02-16 23:49:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524641972] [2023-02-16 23:49:46,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:49:46,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-16 23:49:46,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-16 23:49:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 23:49:46,032 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:49:48,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 23:49:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:49,520 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2023-02-16 23:49:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-16 23:49:49,521 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-16 23:49:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:49,522 INFO L225 Difference]: With dead ends: 103 [2023-02-16 23:49:49,522 INFO L226 Difference]: Without dead ends: 97 [2023-02-16 23:49:49,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=636, Invalid=4620, Unknown=0, NotChecked=0, Total=5256 [2023-02-16 23:49:49,523 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 81 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:49,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 314 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 965 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2023-02-16 23:49:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-16 23:49:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2023-02-16 23:49:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:49:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2023-02-16 23:49:49,532 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 50 [2023-02-16 23:49:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:49,532 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2023-02-16 23:49:49,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:49:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2023-02-16 23:49:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-16 23:49:49,533 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:49,533 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-02-16 23:49:49,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 23:49:49,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:49,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:49,742 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2023-02-16 23:49:49,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:49,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265032858] [2023-02-16 23:49:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:50,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:50,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:49:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:50,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:49:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 23:49:50,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:50,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265032858] [2023-02-16 23:49:50,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265032858] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:50,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725893913] [2023-02-16 23:49:50,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:49:50,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:50,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:50,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:49:50,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 23:49:50,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:49:50,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:49:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-16 23:49:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:49:50,450 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 [2023-02-16 23:49:50,696 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:49:50,697 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2023-02-16 23:49:50,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 64 [2023-02-16 23:49:50,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 30 [2023-02-16 23:49:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:49:50,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:49:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725893913] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:51,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:49:51,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2023-02-16 23:49:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845368643] [2023-02-16 23:49:51,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:49:51,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-16 23:49:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-16 23:49:51,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2690, Unknown=0, NotChecked=0, Total=2970 [2023-02-16 23:49:51,867 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:49:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:49:53,482 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2023-02-16 23:49:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 23:49:53,483 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-16 23:49:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:49:53,484 INFO L225 Difference]: With dead ends: 135 [2023-02-16 23:49:53,484 INFO L226 Difference]: Without dead ends: 131 [2023-02-16 23:49:53,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=821, Invalid=5821, Unknown=0, NotChecked=0, Total=6642 [2023-02-16 23:49:53,486 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 23:49:53,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 200 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 23:49:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-16 23:49:53,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2023-02-16 23:49:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 23:49:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2023-02-16 23:49:53,500 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 50 [2023-02-16 23:49:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:49:53,501 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2023-02-16 23:49:53,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:49:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2023-02-16 23:49:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-16 23:49:53,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:49:53,502 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-02-16 23:49:53,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-16 23:49:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:53,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:49:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:49:53,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2023-02-16 23:49:53,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:49:53,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076504434] [2023-02-16 23:49:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:49:53,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:49:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:54,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:49:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:54,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:49:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:49:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:54,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:49:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:49:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 23:49:54,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:49:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076504434] [2023-02-16 23:49:54,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076504434] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012983928] [2023-02-16 23:49:54,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:49:54,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:49:54,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:49:54,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:49:54,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 23:49:54,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:49:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:49:54,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-16 23:49:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:49:54,238 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 [2023-02-16 23:49:54,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:49:54,406 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-02-16 23:49:54,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 73 [2023-02-16 23:49:54,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 39 [2023-02-16 23:49:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:49:54,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:49:57,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012983928] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:49:57,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:49:57,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2023-02-16 23:49:57,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352307686] [2023-02-16 23:49:57,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:49:57,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-16 23:49:57,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:49:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-16 23:49:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2035, Unknown=1, NotChecked=0, Total=2256 [2023-02-16 23:49:57,064 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:49:59,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 23:50:02,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 23:50:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:50:02,467 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2023-02-16 23:50:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-16 23:50:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-16 23:50:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:50:02,468 INFO L225 Difference]: With dead ends: 164 [2023-02-16 23:50:02,469 INFO L226 Difference]: Without dead ends: 158 [2023-02-16 23:50:02,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=795, Invalid=5210, Unknown=1, NotChecked=0, Total=6006 [2023-02-16 23:50:02,470 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 100 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-02-16 23:50:02,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 224 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 996 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-02-16 23:50:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-16 23:50:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 74. [2023-02-16 23:50:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:50:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2023-02-16 23:50:02,481 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 50 [2023-02-16 23:50:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:50:02,482 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2023-02-16 23:50:02,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:50:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2023-02-16 23:50:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 23:50:02,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:50:02,483 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:50:02,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 23:50:02,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 23:50:02,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:50:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:50:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2023-02-16 23:50:02,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:50:02,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104117867] [2023-02-16 23:50:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:50:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:50:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:02,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:50:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:02,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:50:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:02,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:50:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:50:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-16 23:50:02,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:50:02,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104117867] [2023-02-16 23:50:02,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104117867] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:50:02,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105577922] [2023-02-16 23:50:02,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 23:50:02,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:50:02,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:50:02,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:50:02,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 23:50:02,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 23:50:02,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:50:02,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 23:50:02,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:50:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-16 23:50:02,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:50:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-16 23:50:02,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105577922] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:50:02,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:50:02,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-16 23:50:02,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147353534] [2023-02-16 23:50:02,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:50:02,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 23:50:02,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:50:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 23:50:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-16 23:50:02,861 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-16 23:50:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:50:02,960 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2023-02-16 23:50:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 23:50:02,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2023-02-16 23:50:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:50:02,962 INFO L225 Difference]: With dead ends: 140 [2023-02-16 23:50:02,962 INFO L226 Difference]: Without dead ends: 113 [2023-02-16 23:50:02,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-16 23:50:02,963 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:50:02,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 104 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:50:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-16 23:50:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2023-02-16 23:50:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 23:50:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2023-02-16 23:50:02,983 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 52 [2023-02-16 23:50:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:50:02,983 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2023-02-16 23:50:02,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-16 23:50:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2023-02-16 23:50:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-16 23:50:02,985 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:50:02,985 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:50:02,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-16 23:50:03,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:50:03,189 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:50:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:50:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2023-02-16 23:50:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:50:03,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122010618] [2023-02-16 23:50:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:50:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:50:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:03,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:50:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:03,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:50:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:03,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:50:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:03,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:50:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:03,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 23:50:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-16 23:50:03,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:50:03,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122010618] [2023-02-16 23:50:03,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122010618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:50:03,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989645523] [2023-02-16 23:50:03,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 23:50:03,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:50:03,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:50:03,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:50:03,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 23:50:03,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 23:50:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:50:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 23:50:03,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:50:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-16 23:50:03,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:50:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-16 23:50:03,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989645523] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:50:03,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:50:03,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-16 23:50:03,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077946195] [2023-02-16 23:50:03,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:50:03,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 23:50:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:50:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 23:50:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-16 23:50:03,375 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-16 23:50:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:50:03,481 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2023-02-16 23:50:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 23:50:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2023-02-16 23:50:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:50:03,482 INFO L225 Difference]: With dead ends: 98 [2023-02-16 23:50:03,482 INFO L226 Difference]: Without dead ends: 88 [2023-02-16 23:50:03,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-16 23:50:03,483 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:50:03,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 118 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:50:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-16 23:50:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2023-02-16 23:50:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 23:50:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-16 23:50:03,492 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2023-02-16 23:50:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:50:03,492 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-16 23:50:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-16 23:50:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-16 23:50:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-16 23:50:03,493 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:50:03,493 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:50:03,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 23:50:03,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 23:50:03,698 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:50:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:50:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2023-02-16 23:50:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:50:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485269996] [2023-02-16 23:50:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:50:03,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:50:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:04,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:50:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:04,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:50:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:04,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:50:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:04,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:50:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:04,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 23:50:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-16 23:50:04,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:50:04,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485269996] [2023-02-16 23:50:04,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485269996] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:50:04,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310941433] [2023-02-16 23:50:04,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 23:50:04,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:50:04,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:50:04,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:50:04,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 23:50:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-16 23:50:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:50:04,707 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 [2023-02-16 23:50:05,129 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:50:05,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:05,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 66 [2023-02-16 23:50:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:50:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:05,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 85 [2023-02-16 23:50:05,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 110 [2023-02-16 23:50:05,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 45 [2023-02-16 23:50:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 23:50:05,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:50:16,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310941433] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:50:16,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:50:16,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2023-02-16 23:50:16,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593356532] [2023-02-16 23:50:16,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:50:16,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-16 23:50:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:50:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-16 23:50:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=3965, Unknown=4, NotChecked=0, Total=4290 [2023-02-16 23:50:16,295 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 23:50:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:50:19,472 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2023-02-16 23:50:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-16 23:50:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-16 23:50:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:50:19,478 INFO L225 Difference]: With dead ends: 130 [2023-02-16 23:50:19,478 INFO L226 Difference]: Without dead ends: 124 [2023-02-16 23:50:19,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=1057, Invalid=10281, Unknown=4, NotChecked=0, Total=11342 [2023-02-16 23:50:19,483 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 159 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:50:19,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 402 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-16 23:50:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-16 23:50:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 90. [2023-02-16 23:50:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 78 states have internal predecessors, (99), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 23:50:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2023-02-16 23:50:19,502 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 64 [2023-02-16 23:50:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:50:19,502 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2023-02-16 23:50:19,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 23:50:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2023-02-16 23:50:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-16 23:50:19,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:50:19,503 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:50:19,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 23:50:19,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 23:50:19,704 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:50:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:50:19,704 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2023-02-16 23:50:19,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:50:19,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290731360] [2023-02-16 23:50:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:50:19,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:50:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 23:50:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:20,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 23:50:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:20,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:50:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 23:50:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:20,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 23:50:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:50:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-16 23:50:20,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:50:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290731360] [2023-02-16 23:50:20,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290731360] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:50:20,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047121700] [2023-02-16 23:50:20,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:50:20,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:50:20,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:50:20,582 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:50:20,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 23:50:20,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-16 23:50:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:50:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-16 23:50:20,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:50:20,725 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 [2023-02-16 23:50:21,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:21,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:21,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:21,230 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 23:50:21,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 62 [2023-02-16 23:50:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:21,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2023-02-16 23:50:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:21,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:50:21,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:50:21,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 245 [2023-02-16 23:50:34,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:50:34,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 187 select indices, 187 select index equivalence classes, 1 disjoint index pairs (out of 17391 index pairs), introduced 187 new quantified variables, introduced 17391 case distinctions, treesize of input 11327 treesize of output 294935