./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 08:00:24,632 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 08:00:24,686 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 08:00:24,688 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 08:00:24,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 08:00:24,710 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 08:00:24,711 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 08:00:24,712 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 08:00:24,712 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 08:00:24,713 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 08:00:24,713 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 08:00:24,714 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 08:00:24,714 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 08:00:24,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 08:00:24,714 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 08:00:24,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 08:00:24,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 08:00:24,716 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 08:00:24,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 08:00:24,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 08:00:24,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 08:00:24,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 08:00:24,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 08:00:24,719 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 08:00:24,719 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 08:00:24,720 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 08:00:24,720 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 08:00:24,720 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 08:00:24,720 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 08:00:24,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 08:00:24,720 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 08:00:24,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 08:00:24,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:00:24,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 08:00:24,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 08:00:24,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 08:00:24,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 08:00:24,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 08:00:24,721 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 08:00:24,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 08:00:24,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 08:00:24,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 08:00:24,722 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 [2024-11-16 08:00:24,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 08:00:24,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 08:00:24,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 08:00:24,947 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 08:00:24,947 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 08:00:24,948 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2024-11-16 08:00:26,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 08:00:26,342 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 08:00:26,342 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2024-11-16 08:00:26,348 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b5f93e2/9485dc37e8364580bda7b8e836b56bc8/FLAG2c469fc69 [2024-11-16 08:00:26,358 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b5f93e2/9485dc37e8364580bda7b8e836b56bc8 [2024-11-16 08:00:26,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 08:00:26,360 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 08:00:26,361 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 08:00:26,361 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 08:00:26,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 08:00:26,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3633a4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26, skipping insertion in model container [2024-11-16 08:00:26,366 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,384 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 08:00:26,513 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i[1692,1705] [2024-11-16 08:00:26,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:00:26,529 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 08:00:26,537 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i[1692,1705] [2024-11-16 08:00:26,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:00:26,554 INFO L204 MainTranslator]: Completed translation [2024-11-16 08:00:26,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26 WrapperNode [2024-11-16 08:00:26,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 08:00:26,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 08:00:26,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 08:00:26,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 08:00:26,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,564 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,575 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-11-16 08:00:26,576 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 08:00:26,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 08:00:26,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 08:00:26,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 08:00:26,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,585 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,598 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 3, 13]. 72 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 5 writes are split as follows [0, 1, 4]. [2024-11-16 08:00:26,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,598 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,603 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,604 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,605 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 08:00:26,608 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 08:00:26,608 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 08:00:26,608 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 08:00:26,608 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (1/1) ... [2024-11-16 08:00:26,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:00:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:26,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 08:00:26,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 08:00:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 08:00:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_33_0 [2024-11-16 08:00:26,675 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_33_0 [2024-11-16 08:00:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 08:00:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 08:00:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 08:00:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 08:00:26,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 08:00:26,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 08:00:26,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 08:00:26,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 08:00:26,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 08:00:26,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 08:00:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 08:00:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 08:00:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 08:00:26,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 08:00:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 08:00:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_40_0 [2024-11-16 08:00:26,678 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_40_0 [2024-11-16 08:00:26,743 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 08:00:26,745 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 08:00:26,936 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-16 08:00:26,936 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 08:00:26,946 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 08:00:26,948 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 08:00:26,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:00:26 BoogieIcfgContainer [2024-11-16 08:00:26,948 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 08:00:26,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 08:00:26,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 08:00:26,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 08:00:26,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:00:26" (1/3) ... [2024-11-16 08:00:26,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b40eeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:00:26, skipping insertion in model container [2024-11-16 08:00:26,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:26" (2/3) ... [2024-11-16 08:00:26,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b40eeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:00:26, skipping insertion in model container [2024-11-16 08:00:26,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:00:26" (3/3) ... [2024-11-16 08:00:26,957 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_1-1.i [2024-11-16 08:00:26,968 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 08:00:26,968 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 08:00:27,011 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 08:00:27,015 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1e57b314, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 08:00:27,016 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 08:00:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 08:00:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 08:00:27,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:27,024 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:27,025 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:27,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1788061132, now seen corresponding path program 1 times [2024-11-16 08:00:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:27,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637749664] [2024-11-16 08:00:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:27,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:27,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:00:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:27,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637749664] [2024-11-16 08:00:27,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637749664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:00:27,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:00:27,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 08:00:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381299900] [2024-11-16 08:00:27,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:00:27,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 08:00:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 08:00:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-16 08:00:27,569 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:00:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:27,751 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-11-16 08:00:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 08:00:27,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-16 08:00:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:27,758 INFO L225 Difference]: With dead ends: 62 [2024-11-16 08:00:27,758 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 08:00:27,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-16 08:00:27,763 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:27,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 36 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:00:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 08:00:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-16 08:00:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-16 08:00:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-16 08:00:27,796 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2024-11-16 08:00:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:27,797 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-16 08:00:27,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:00:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-16 08:00:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-16 08:00:27,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:27,800 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:27,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 08:00:27,800 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:27,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 180097475, now seen corresponding path program 1 times [2024-11-16 08:00:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:27,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368474035] [2024-11-16 08:00:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:27,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 08:00:28,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:28,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368474035] [2024-11-16 08:00:28,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368474035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065377650] [2024-11-16 08:00:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:28,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:28,339 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) [2024-11-16 08:00:28,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 08:00:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-16 08:00:28,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:28,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:00:28,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-11-16 08:00:28,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-16 08:00:28,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:00:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:00:28,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:29,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2024-11-16 08:00:29,420 INFO L378 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 38 treesize of output 36 [2024-11-16 08:00:29,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 08:00:29,697 INFO L378 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 98 treesize of output 100 [2024-11-16 08:00:29,751 INFO L378 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 7 treesize of output 5 [2024-11-16 08:00:29,762 INFO L378 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 50 treesize of output 48 [2024-11-16 08:00:29,780 INFO L378 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 46 treesize of output 44 [2024-11-16 08:00:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:00:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065377650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:29,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 15] total 33 [2024-11-16 08:00:29,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045916074] [2024-11-16 08:00:29,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:29,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-16 08:00:29,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-16 08:00:29,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 08:00:29,948 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 33 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:00:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:30,646 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2024-11-16 08:00:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 08:00:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 22 [2024-11-16 08:00:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:30,647 INFO L225 Difference]: With dead ends: 55 [2024-11-16 08:00:30,648 INFO L226 Difference]: Without dead ends: 35 [2024-11-16 08:00:30,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2024-11-16 08:00:30,650 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:30,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 105 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 08:00:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-16 08:00:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-11-16 08:00:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:00:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-11-16 08:00:30,655 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 22 [2024-11-16 08:00:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:30,656 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-11-16 08:00:30,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:00:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-11-16 08:00:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-16 08:00:30,657 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:30,657 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:30,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 08:00:30,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:30,858 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:30,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:30,858 INFO L85 PathProgramCache]: Analyzing trace with hash 865831144, now seen corresponding path program 2 times [2024-11-16 08:00:30,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:30,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592851209] [2024-11-16 08:00:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:31,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:31,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:31,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 08:00:31,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:31,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592851209] [2024-11-16 08:00:31,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592851209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:31,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986095069] [2024-11-16 08:00:31,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:00:31,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:31,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:31,504 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) [2024-11-16 08:00:31,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 08:00:31,578 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:00:31,578 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:31,584 WARN L253 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-16 08:00:31,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:31,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:00:31,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 70 [2024-11-16 08:00:31,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2024-11-16 08:00:31,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2024-11-16 08:00:31,913 INFO L349 Elim1Store]: treesize reduction 63, result has 21.3 percent of original size [2024-11-16 08:00:31,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 102 [2024-11-16 08:00:32,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-16 08:00:32,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:00:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:00:32,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:33,052 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:33,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 08:00:33,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 144 [2024-11-16 08:00:33,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 08:00:33,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 23 [2024-11-16 08:00:33,116 INFO L349 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2024-11-16 08:00:33,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 56 treesize of output 48 [2024-11-16 08:00:33,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986095069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:33,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:00:33,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 28 [2024-11-16 08:00:33,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664944855] [2024-11-16 08:00:33,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:33,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 08:00:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 08:00:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 08:00:33,780 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 28 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 08:00:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:35,298 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2024-11-16 08:00:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 08:00:35,300 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 27 [2024-11-16 08:00:35,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:35,302 INFO L225 Difference]: With dead ends: 73 [2024-11-16 08:00:35,302 INFO L226 Difference]: Without dead ends: 53 [2024-11-16 08:00:35,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=342, Invalid=2964, Unknown=0, NotChecked=0, Total=3306 [2024-11-16 08:00:35,305 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:35,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 104 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 08:00:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-16 08:00:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2024-11-16 08:00:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-16 08:00:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-11-16 08:00:35,316 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2024-11-16 08:00:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:35,316 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-11-16 08:00:35,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 08:00:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-11-16 08:00:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 08:00:35,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:35,318 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:35,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 08:00:35,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-16 08:00:35,522 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:35,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1040940385, now seen corresponding path program 3 times [2024-11-16 08:00:35,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:35,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587336500] [2024-11-16 08:00:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:35,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:35,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:36,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:36,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:36,273 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 08:00:36,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587336500] [2024-11-16 08:00:36,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587336500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726419742] [2024-11-16 08:00:36,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 08:00:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:36,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:36,320 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) [2024-11-16 08:00:36,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 08:00:36,397 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 08:00:36,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:36,400 WARN L253 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-16 08:00:36,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:36,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:00:36,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-11-16 08:00:36,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 08:00:36,890 INFO L349 Elim1Store]: treesize reduction 204, result has 18.1 percent of original size [2024-11-16 08:00:36,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 79 [2024-11-16 08:00:37,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-16 08:00:37,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:00:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 08:00:37,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:38,861 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,864 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,864 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,865 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 08:00:38,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 200 [2024-11-16 08:00:38,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 74 [2024-11-16 08:00:38,907 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,907 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,908 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,908 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,909 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 08:00:38,914 INFO L349 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2024-11-16 08:00:38,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 47 [2024-11-16 08:00:38,921 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2024-11-16 08:00:38,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 74 treesize of output 33 [2024-11-16 08:00:40,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726419742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:40,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:00:40,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 34 [2024-11-16 08:00:40,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634832961] [2024-11-16 08:00:40,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:40,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-16 08:00:40,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-16 08:00:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2022, Unknown=0, NotChecked=0, Total=2162 [2024-11-16 08:00:40,627 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 34 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 29 states have internal predecessors, (40), 11 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 08:00:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:43,792 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-11-16 08:00:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-16 08:00:43,792 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 29 states have internal predecessors, (40), 11 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 32 [2024-11-16 08:00:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:43,793 INFO L225 Difference]: With dead ends: 90 [2024-11-16 08:00:43,793 INFO L226 Difference]: Without dead ends: 66 [2024-11-16 08:00:43,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=531, Invalid=5019, Unknown=0, NotChecked=0, Total=5550 [2024-11-16 08:00:43,795 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 137 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:43,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 159 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-16 08:00:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-16 08:00:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2024-11-16 08:00:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 08:00:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-11-16 08:00:43,804 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 32 [2024-11-16 08:00:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:43,805 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-11-16 08:00:43,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 29 states have internal predecessors, (40), 11 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 08:00:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-11-16 08:00:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-16 08:00:43,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:43,806 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:43,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 08:00:44,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:44,006 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:44,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:44,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1206863364, now seen corresponding path program 4 times [2024-11-16 08:00:44,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:44,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767920048] [2024-11-16 08:00:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:44,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:44,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:44,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:44,845 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:44,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:45,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 08:00:45,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:45,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767920048] [2024-11-16 08:00:45,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767920048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:45,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118634949] [2024-11-16 08:00:45,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 08:00:45,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:45,148 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) [2024-11-16 08:00:45,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 08:00:45,223 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 08:00:45,223 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:45,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-16 08:00:45,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:45,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:00:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 08:00:45,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:01:10,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118634949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:01:10,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:01:10,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 22] total 48 [2024-11-16 08:01:10,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75671903] [2024-11-16 08:01:10,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:10,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-16 08:01:10,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-16 08:01:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2008, Unknown=6, NotChecked=0, Total=2256 [2024-11-16 08:01:10,982 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 48 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 41 states have internal predecessors, (51), 13 states have call successors, (14), 8 states have call predecessors, (14), 15 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-16 08:01:15,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 08:01:19,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 08:01:23,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 08:01:27,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 08:01:31,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 08:01:35,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 08:02:03,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 08:02:07,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []