/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-fpi/res2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:34:00,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:34:00,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:34:00,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:34:00,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:34:00,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:34:00,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:34:00,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:34:00,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:34:00,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:34:00,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:34:00,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:34:00,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:34:00,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:34:00,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:34:00,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:34:00,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:34:00,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:34:00,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:34:00,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:34:00,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:34:00,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:34:00,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:34:00,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:34:00,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:34:00,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 22:34:00,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 22:34:00,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 22:34:00,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 22:34:00,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 22:34:00,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 22:34:00,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 22:34:00,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 22:34:00,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:34:00,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:34:00,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:34:00,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:34:00,643 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:34:00,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:34:00,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:34:00,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:34:00,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:34:00,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:34:00,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:34:00,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:34:00,646 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:34:00,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:34:00,647 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:34:00,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:34:00,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:34:00,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:34:00,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:34:00,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:34:00,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:34:00,648 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:34:00,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:34:00,648 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:34:00,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:34:00,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:34:00,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:34:00,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:34:00,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:34:00,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:34:00,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:34:00,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:34:00,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:34:00,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:34:00,650 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:34:00,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:34:00,650 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:34:00,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:34:00,650 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:34:00,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:34:00,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:34:00,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:34:00,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:34:00,867 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:34:00,867 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:34:00,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2.c [2023-03-30 22:34:01,923 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:34:02,087 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:34:02,088 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2.c [2023-03-30 22:34:02,092 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/414a4e87b/f0e2a9bac3454a9e92c9a6f4c95629f1/FLAGb9e8531a7 [2023-03-30 22:34:02,110 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/414a4e87b/f0e2a9bac3454a9e92c9a6f4c95629f1 [2023-03-30 22:34:02,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:34:02,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:34:02,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:34:02,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:34:02,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:34:02,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ffb52c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02, skipping insertion in model container [2023-03-30 22:34:02,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:34:02,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:34:02,236 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2.c[587,600] [2023-03-30 22:34:02,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:34:02,257 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:34:02,266 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2.c[587,600] [2023-03-30 22:34:02,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:34:02,282 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:34:02,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02 WrapperNode [2023-03-30 22:34:02,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:34:02,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:34:02,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:34:02,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:34:02,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:34:02,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:34:02,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:34:02,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:34:02,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (1/1) ... [2023-03-30 22:34:02,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:34:02,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:02,338 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) [2023-03-30 22:34:02,350 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 [2023-03-30 22:34:02,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:34:02,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:34:02,365 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:34:02,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:34:02,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:34:02,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:34:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:34:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-30 22:34:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:34:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:34:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:34:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:34:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:34:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:34:02,417 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:34:02,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:34:02,565 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:34:02,570 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:34:02,570 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-03-30 22:34:02,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:34:02 BoogieIcfgContainer [2023-03-30 22:34:02,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:34:02,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:34:02,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:34:02,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:34:02,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:34:02" (1/3) ... [2023-03-30 22:34:02,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d83626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:34:02, skipping insertion in model container [2023-03-30 22:34:02,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:34:02" (2/3) ... [2023-03-30 22:34:02,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d83626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:34:02, skipping insertion in model container [2023-03-30 22:34:02,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:34:02" (3/3) ... [2023-03-30 22:34:02,577 INFO L112 eAbstractionObserver]: Analyzing ICFG res2.c [2023-03-30 22:34:02,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:34:02,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:34:02,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:34:02,633 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;@5677abdf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:34:02,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:34:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:34:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-30 22:34:02,644 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:02,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:02,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:02,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1259377407, now seen corresponding path program 1 times [2023-03-30 22:34:02,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:02,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055484383] [2023-03-30 22:34:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:02,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:02,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:02,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055484383] [2023-03-30 22:34:02,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055484383] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:34:02,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:34:02,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:34:02,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729246601] [2023-03-30 22:34:02,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:34:02,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:34:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:34:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:34:02,965 INFO L87 Difference]: Start difference. First operand has 43 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:34:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:03,051 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2023-03-30 22:34:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:34:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-03-30 22:34:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:03,065 INFO L225 Difference]: With dead ends: 76 [2023-03-30 22:34:03,065 INFO L226 Difference]: Without dead ends: 36 [2023-03-30 22:34:03,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:34:03,069 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:03,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:34:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-30 22:34:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-03-30 22:34:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-03-30 22:34:03,112 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2023-03-30 22:34:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:03,112 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-03-30 22:34:03,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:34:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-03-30 22:34:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-30 22:34:03,114 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:03,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:03,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:34:03,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:03,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:03,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1596973367, now seen corresponding path program 1 times [2023-03-30 22:34:03,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:03,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400079981] [2023-03-30 22:34:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:03,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:03,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:03,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:03,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:03,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400079981] [2023-03-30 22:34:03,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400079981] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:34:03,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:34:03,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:34:03,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641557424] [2023-03-30 22:34:03,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:34:03,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:34:03,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:34:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:34:03,272 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:03,352 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2023-03-30 22:34:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:34:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-03-30 22:34:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:03,353 INFO L225 Difference]: With dead ends: 69 [2023-03-30 22:34:03,353 INFO L226 Difference]: Without dead ends: 48 [2023-03-30 22:34:03,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:34:03,354 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:03,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 25 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:34:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-03-30 22:34:03,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-03-30 22:34:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-03-30 22:34:03,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2023-03-30 22:34:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:03,367 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-03-30 22:34:03,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-03-30 22:34:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-30 22:34:03,370 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:03,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:03,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:34:03,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:03,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash 378806037, now seen corresponding path program 1 times [2023-03-30 22:34:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:03,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317936762] [2023-03-30 22:34:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:04,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:04,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:04,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317936762] [2023-03-30 22:34:04,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317936762] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:04,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672788432] [2023-03-30 22:34:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:04,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:04,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:04,845 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) [2023-03-30 22:34:04,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:34:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:04,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 66 conjunts are in the unsatisfiable core [2023-03-30 22:34:04,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:05,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:34:05,132 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:34:05,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-03-30 22:34:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:05,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:34:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:05,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-03-30 22:34:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:05,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-03-30 22:34:05,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:05,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2023-03-30 22:34:06,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:06,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 40 [2023-03-30 22:34:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:06,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2023-03-30 22:34:06,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:34:06,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2023-03-30 22:34:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:06,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:34:36,710 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:34:36,711 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:34:36,712 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:34:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672788432] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:34:45,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:34:45,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2023-03-30 22:34:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140509949] [2023-03-30 22:34:45,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:34:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-03-30 22:34:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-03-30 22:34:45,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2263, Unknown=12, NotChecked=0, Total=2652 [2023-03-30 22:34:45,817 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 52 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:34:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:48,195 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-03-30 22:34:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-30 22:34:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2023-03-30 22:34:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:48,197 INFO L225 Difference]: With dead ends: 69 [2023-03-30 22:34:48,197 INFO L226 Difference]: Without dead ends: 63 [2023-03-30 22:34:48,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=674, Invalid=4144, Unknown=12, NotChecked=0, Total=4830 [2023-03-30 22:34:48,199 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 110 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:48,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 189 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:34:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-03-30 22:34:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2023-03-30 22:34:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2023-03-30 22:34:48,227 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 41 [2023-03-30 22:34:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:48,228 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2023-03-30 22:34:48,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:34:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2023-03-30 22:34:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-30 22:34:48,231 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:48,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:48,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:34:48,439 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 [2023-03-30 22:34:48,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:48,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1970902185, now seen corresponding path program 2 times [2023-03-30 22:34:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:48,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389900237] [2023-03-30 22:34:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:48,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:48,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:34:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389900237] [2023-03-30 22:34:48,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389900237] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489463325] [2023-03-30 22:34:48,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:34:48,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:48,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:48,554 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) [2023-03-30 22:34:48,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:34:48,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:34:48,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:34:48,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:34:48,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:34:48,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:34:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:34:48,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489463325] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:34:48,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:34:48,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:34:48,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296362813] [2023-03-30 22:34:48,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:34:48,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:34:48,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:34:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:34:48,767 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:34:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:49,031 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2023-03-30 22:34:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:34:49,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-03-30 22:34:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:49,033 INFO L225 Difference]: With dead ends: 140 [2023-03-30 22:34:49,033 INFO L226 Difference]: Without dead ends: 82 [2023-03-30 22:34:49,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:34:49,034 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:49,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 58 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:34:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-03-30 22:34:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2023-03-30 22:34:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2023-03-30 22:34:49,050 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 43 [2023-03-30 22:34:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:49,050 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2023-03-30 22:34:49,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:34:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2023-03-30 22:34:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-30 22:34:49,051 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:49,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:49,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 22:34:49,259 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 [2023-03-30 22:34:49,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:49,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1791240999, now seen corresponding path program 3 times [2023-03-30 22:34:49,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:49,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115629781] [2023-03-30 22:34:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:49,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:49,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:49,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:34:49,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115629781] [2023-03-30 22:34:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115629781] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593162858] [2023-03-30 22:34:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:34:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:49,363 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) [2023-03-30 22:34:49,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:34:49,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:34:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:34:49,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:34:49,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:34:49,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:34:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:34:49,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593162858] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:34:49,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:34:49,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:34:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017644155] [2023-03-30 22:34:49,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:34:49,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:34:49,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:34:49,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:34:49,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:34:49,549 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:34:49,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:34:49,773 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2023-03-30 22:34:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:34:49,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-03-30 22:34:49,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:34:49,775 INFO L225 Difference]: With dead ends: 77 [2023-03-30 22:34:49,775 INFO L226 Difference]: Without dead ends: 59 [2023-03-30 22:34:49,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-03-30 22:34:49,776 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:34:49,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 68 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:34:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-30 22:34:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2023-03-30 22:34:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:34:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-03-30 22:34:49,782 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 45 [2023-03-30 22:34:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:34:49,782 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-03-30 22:34:49,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:34:49,783 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-03-30 22:34:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-30 22:34:49,783 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:34:49,783 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:34:49,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:34:49,988 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 [2023-03-30 22:34:49,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:34:49,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:34:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1298349409, now seen corresponding path program 4 times [2023-03-30 22:34:49,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:34:49,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765184885] [2023-03-30 22:34:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:34:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:34:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:52,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:34:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:34:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:34:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:34:52,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765184885] [2023-03-30 22:34:52,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765184885] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:34:52,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308688631] [2023-03-30 22:34:52,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:34:52,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:34:52,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:34:52,701 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) [2023-03-30 22:34:52,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:34:52,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:34:52,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:34:52,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 105 conjunts are in the unsatisfiable core [2023-03-30 22:34:52,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:34:52,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:34:52,856 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-03-30 22:34:52,856 INFO L350 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 40 treesize of output 34 [2023-03-30 22:34:52,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:34:53,175 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:34:53,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-03-30 22:34:53,609 INFO L321 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-03-30 22:34:53,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2023-03-30 22:34:53,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-30 22:34:54,231 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:34:54,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 38 [2023-03-30 22:34:54,488 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-03-30 22:34:54,488 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 3 case distinctions, treesize of input 40 treesize of output 48 [2023-03-30 22:34:54,829 INFO L321 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2023-03-30 22:34:54,829 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2023-03-30 22:34:55,083 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 66 treesize of output 58 [2023-03-30 22:34:55,433 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 58 treesize of output 61 [2023-03-30 22:34:55,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 71 [2023-03-30 22:34:56,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 79 [2023-03-30 22:34:56,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 80 [2023-03-30 22:34:56,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 30 [2023-03-30 22:34:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:34:56,767 INFO L327 TraceCheckSpWp]: Computing backward predicates...