/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/ms3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:33:01,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:33:01,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:33:01,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:33:01,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:33:01,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:33:01,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:33:01,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:33:01,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:33:01,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:33:01,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:33:01,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:33:01,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:33:01,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:33:01,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:33:01,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:33:01,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:33:01,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:33:01,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:33:01,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:33:01,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:33:01,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:33:01,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:33:01,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:33:01,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:33:01,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 22:33:01,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 22:33:01,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 22:33:01,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 22:33:01,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 22:33:01,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 22:33:01,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 22:33:01,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 22:33:01,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:33:01,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:33:01,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:33:01,747 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 22:33:01,775 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:33:01,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:33:01,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:33:01,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:33:01,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:33:01,777 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:33:01,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:33:01,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:33:01,778 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:33:01,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:33:01,779 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:33:01,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:33:01,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:33:01,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:33:01,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:33:01,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:33:01,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:33:01,779 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:33:01,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:33:01,780 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:33:01,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:33:01,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:33:01,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:33:01,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:33:01,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:33:01,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:33:01,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:33:01,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:33:01,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:33:01,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:33:01,781 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:33:01,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:33:01,782 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:33:01,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:33:01,782 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:33:01,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:33:02,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:33:02,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:33:02,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:33:02,058 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:33:02,059 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:33:02,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms3.c [2023-03-30 22:33:03,155 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:33:03,343 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:33:03,343 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms3.c [2023-03-30 22:33:03,348 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304e15720/155cb10acec74a60a202e01676d8d501/FLAGcad88f1cd [2023-03-30 22:33:03,366 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304e15720/155cb10acec74a60a202e01676d8d501 [2023-03-30 22:33:03,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:33:03,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:33:03,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:33:03,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:33:03,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:33:03,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3bfcfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03, skipping insertion in model container [2023-03-30 22:33:03,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:33:03,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:33:03,534 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/ms3.c[586,599] [2023-03-30 22:33:03,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:33:03,566 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:33:03,580 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/ms3.c[586,599] [2023-03-30 22:33:03,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:33:03,611 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:33:03,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03 WrapperNode [2023-03-30 22:33:03,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:33:03,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:33:03,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:33:03,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:33:03,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:33:03,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:33:03,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:33:03,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:33:03,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (1/1) ... [2023-03-30 22:33:03,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:33:03,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:33:03,681 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 22:33:03,688 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 22:33:03,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:33:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:33:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:33:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:33:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:33:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:33:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:33:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:33:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:33:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:33:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:33:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:33:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:33:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-30 22:33:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:33:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:33:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-30 22:33:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:33:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:33:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:33:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:33:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:33:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:33:03,793 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:33:03,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:33:03,963 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:33:03,981 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:33:03,981 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-30 22:33:03,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:33:03 BoogieIcfgContainer [2023-03-30 22:33:03,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:33:03,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:33:03,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:33:03,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:33:03,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:33:03" (1/3) ... [2023-03-30 22:33:03,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72911033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:33:03, skipping insertion in model container [2023-03-30 22:33:03,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:33:03" (2/3) ... [2023-03-30 22:33:03,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72911033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:33:03, skipping insertion in model container [2023-03-30 22:33:03,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:33:03" (3/3) ... [2023-03-30 22:33:04,000 INFO L112 eAbstractionObserver]: Analyzing ICFG ms3.c [2023-03-30 22:33:04,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:33:04,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:33:04,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:33:04,069 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;@6d14bd07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:33:04,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:33:04,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 22:33:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-30 22:33:04,079 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:33:04,080 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] [2023-03-30 22:33:04,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:33:04,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:33:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 863653859, now seen corresponding path program 1 times [2023-03-30 22:33:04,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:33:04,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919721359] [2023-03-30 22:33:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:33:04,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:33:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:04,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:33:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:04,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:33:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:04,291 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 22:33:04,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:33:04,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919721359] [2023-03-30 22:33:04,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919721359] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:33:04,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:33:04,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:33:04,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907051375] [2023-03-30 22:33:04,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:33:04,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:33:04,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:33:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:33:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:33:04,338 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 22:33:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:33:04,439 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-03-30 22:33:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:33:04,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 21 [2023-03-30 22:33:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:33:04,447 INFO L225 Difference]: With dead ends: 54 [2023-03-30 22:33:04,447 INFO L226 Difference]: Without dead ends: 25 [2023-03-30 22:33:04,449 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 22:33:04,452 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:33:04,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:33:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-30 22:33:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-03-30 22:33:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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 22:33:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-03-30 22:33:04,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2023-03-30 22:33:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:33:04,485 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-03-30 22:33:04,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 22:33:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-03-30 22:33:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-30 22:33:04,487 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:33:04,487 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] [2023-03-30 22:33:04,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:33:04,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:33:04,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:33:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1121819297, now seen corresponding path program 1 times [2023-03-30 22:33:04,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:33:04,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970502101] [2023-03-30 22:33:04,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:33:04,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:33:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:04,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:33:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:04,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:33:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:04,639 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 22:33:04,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:33:04,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970502101] [2023-03-30 22:33:04,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970502101] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:33:04,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:33:04,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:33:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428507618] [2023-03-30 22:33:04,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:33:04,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:33:04,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:33:04,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:33:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:33:04,643 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 22:33:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:33:04,723 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-03-30 22:33:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:33:04,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-03-30 22:33:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:33:04,725 INFO L225 Difference]: With dead ends: 40 [2023-03-30 22:33:04,725 INFO L226 Difference]: Without dead ends: 30 [2023-03-30 22:33:04,729 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 22:33:04,734 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:33:04,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 18 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:33:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-30 22:33:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-03-30 22:33:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 22:33:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-03-30 22:33:04,744 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2023-03-30 22:33:04,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:33:04,745 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-03-30 22:33:04,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 22:33:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-03-30 22:33:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-30 22:33:04,747 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:33:04,748 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] [2023-03-30 22:33:04,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:33:04,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:33:04,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:33:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash -667943349, now seen corresponding path program 1 times [2023-03-30 22:33:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:33:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613206981] [2023-03-30 22:33:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:33:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:33:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:05,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:33:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:05,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:33:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:33:05,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:33:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613206981] [2023-03-30 22:33:05,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613206981] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:33:05,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:33:05,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-30 22:33:05,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461366381] [2023-03-30 22:33:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:33:05,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:33:05,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:33:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:33:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:33:05,068 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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 22:33:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:33:05,218 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-03-30 22:33:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 22:33:05,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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 26 [2023-03-30 22:33:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:33:05,220 INFO L225 Difference]: With dead ends: 37 [2023-03-30 22:33:05,220 INFO L226 Difference]: Without dead ends: 31 [2023-03-30 22:33:05,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:33:05,221 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:33:05,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 55 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:33:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-30 22:33:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-03-30 22:33:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 22:33:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-03-30 22:33:05,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2023-03-30 22:33:05,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:33:05,229 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-03-30 22:33:05,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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 22:33:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-03-30 22:33:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-30 22:33:05,231 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:33:05,231 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] [2023-03-30 22:33:05,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:33:05,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:33:05,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:33:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash 750383777, now seen corresponding path program 1 times [2023-03-30 22:33:05,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:33:05,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819619916] [2023-03-30 22:33:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:33:05,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:33:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:05,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:33:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:05,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:33:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:05,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:33:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819619916] [2023-03-30 22:33:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819619916] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:33:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605708560] [2023-03-30 22:33:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:33:05,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:33:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:33:05,359 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 22:33:05,362 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 22:33:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:05,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:33:05,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:33:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:05,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:33:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:05,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605708560] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:33:05,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:33:05,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:33:05,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450369254] [2023-03-30 22:33:05,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:33:05,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:33:05,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:33:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:33:05,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:33:05,612 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 22:33:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:33:05,756 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-03-30 22:33:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:33:05,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 29 [2023-03-30 22:33:05,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:33:05,759 INFO L225 Difference]: With dead ends: 51 [2023-03-30 22:33:05,759 INFO L226 Difference]: Without dead ends: 35 [2023-03-30 22:33:05,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 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 22:33:05,767 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:33:05,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:33:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-30 22:33:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-03-30 22:33:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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 22:33:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-03-30 22:33:05,780 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2023-03-30 22:33:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:33:05,780 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-03-30 22:33:05,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 22:33:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-03-30 22:33:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-30 22:33:05,781 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:33:05,782 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] [2023-03-30 22:33:05,790 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 22:33:05,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:33:05,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:33:05,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:33:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash 253872099, now seen corresponding path program 2 times [2023-03-30 22:33:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:33:05,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006417325] [2023-03-30 22:33:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:33:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:33:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:06,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:33:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:06,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:33:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:06,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:33:06,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006417325] [2023-03-30 22:33:06,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006417325] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:33:06,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56572517] [2023-03-30 22:33:06,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:33:06,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:33:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:33:06,691 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 22:33:06,694 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 22:33:06,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:33:06,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:33:06,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-30 22:33:06,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:33:06,973 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 15 treesize of output 11 [2023-03-30 22:33:07,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:33:07,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2023-03-30 22:33:07,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:33:07,782 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-03-30 22:33:07,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2023-03-30 22:33:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:33:07,942 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-03-30 22:33:07,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2023-03-30 22:33:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:08,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:33:08,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2023-03-30 22:33:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:08,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56572517] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:33:08,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:33:08,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 15] total 42 [2023-03-30 22:33:08,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936781724] [2023-03-30 22:33:08,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:33:08,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-03-30 22:33:08,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:33:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-03-30 22:33:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2023-03-30 22:33:08,692 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:33:13,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:33:13,859 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2023-03-30 22:33:13,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-03-30 22:33:13,860 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-03-30 22:33:13,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:33:13,862 INFO L225 Difference]: With dead ends: 91 [2023-03-30 22:33:13,862 INFO L226 Difference]: Without dead ends: 54 [2023-03-30 22:33:13,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1200, Invalid=6810, Unknown=0, NotChecked=0, Total=8010 [2023-03-30 22:33:13,865 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 204 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:33:13,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 100 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 22:33:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-30 22:33:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2023-03-30 22:33:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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 22:33:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-03-30 22:33:13,874 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2023-03-30 22:33:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:33:13,874 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-03-30 22:33:13,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:33:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-03-30 22:33:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-30 22:33:13,875 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:33:13,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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 22:33:13,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:33:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:33:14,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:33:14,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:33:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1902000633, now seen corresponding path program 3 times [2023-03-30 22:33:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:33:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191779855] [2023-03-30 22:33:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:33:14,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:33:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:15,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:33:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:15,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-03-30 22:33:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:33:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:15,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:33:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191779855] [2023-03-30 22:33:15,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191779855] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:33:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733511203] [2023-03-30 22:33:15,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:33:15,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:33:15,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:33:15,129 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 22:33:15,132 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 22:33:15,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-30 22:33:15,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:33:15,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 45 conjunts are in the unsatisfiable core [2023-03-30 22:33:15,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:33:15,385 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 13 treesize of output 9 [2023-03-30 22:33:15,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-03-30 22:33:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:33:15,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:33:15,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-03-30 22:33:15,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:33:15,744 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-03-30 22:33:15,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2023-03-30 22:33:15,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:33:15,946 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-03-30 22:33:15,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 63 [2023-03-30 22:33:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:33:18,073 INFO L321 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2023-03-30 22:33:18,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 21 [2023-03-30 22:33:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:18,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:33:30,827 WARN L223 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-30 22:33:30,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:33:30,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2113 treesize of output 2052 [2023-03-30 22:33:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:33:32,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733511203] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:33:32,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:33:32,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 19] total 56 [2023-03-30 22:33:32,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690924239] [2023-03-30 22:33:32,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:33:32,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-03-30 22:33:32,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:33:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-03-30 22:33:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2714, Unknown=0, NotChecked=0, Total=3080 [2023-03-30 22:33:32,516 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 56 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 52 states have internal predecessors, (77), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:33:48,009 WARN L223 SmtUtils]: Spent 11.84s on a formula simplification. DAG size of input: 140 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-30 22:33:50,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]