/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/s5if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:03:30,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:03:30,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:03:30,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 20:03:30,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 20:03:30,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 20:03:30,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 20:03:30,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 20:03:30,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 20:03:30,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 20:03:30,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 20:03:30,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 20:03:30,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:03:30,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:03:30,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:03:30,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:03:30,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:03:30,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:03:30,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:03:30,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:03:30,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:03:30,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:03:30,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:03:30,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:03:30,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 20:03:30,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 20:03:30,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 20:03:30,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 20:03:30,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 20:03:30,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 20:03:30,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 20:03:30,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 20:03:30,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 20:03:30,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:03:30,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:03:30,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:03:30,856 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 [2023-04-01 20:03:30,873 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:03:30,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:03:30,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:03:30,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:03:30,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:03:30,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:03:30,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:03:30,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:03:30,876 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:03:30,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:03:30,876 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:03:30,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:03:30,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:03:30,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:03:30,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:03:30,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:03:30,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:03:30,878 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:03:30,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:03:30,878 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:03:30,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:03:30,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:03:30,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:03:30,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:03:30,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:03:30,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:03:30,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:03:30,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:03:30,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:03:30,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:03:30,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:03:30,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:03:30,884 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:03:30,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:03:30,884 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:03:30,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:03:31,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:03:31,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:03:31,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:03:31,124 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:03:31,124 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:03:31,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s5if.c [2023-04-01 20:03:32,293 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:03:32,451 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:03:32,452 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s5if.c [2023-04-01 20:03:32,457 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aef7a05f3/1c045235a98b40ecae8a324fa42fd558/FLAG3f3fd9429 [2023-04-01 20:03:32,469 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aef7a05f3/1c045235a98b40ecae8a324fa42fd558 [2023-04-01 20:03:32,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:03:32,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:03:32,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:03:32,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:03:32,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:03:32,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609ee5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32, skipping insertion in model container [2023-04-01 20:03:32,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:03:32,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:03:32,600 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/s5if.c[587,600] [2023-04-01 20:03:32,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:03:32,627 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:03:32,635 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/s5if.c[587,600] [2023-04-01 20:03:32,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:03:32,658 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:03:32,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32 WrapperNode [2023-04-01 20:03:32,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:03:32,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:03:32,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:03:32,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:03:32,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,684 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:03:32,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:03:32,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:03:32,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:03:32,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (1/1) ... [2023-04-01 20:03:32,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:03:32,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:32,726 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) [2023-04-01 20:03:32,735 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 [2023-04-01 20:03:32,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:03:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:03:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:03:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 20:03:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 20:03:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:03:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:03:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:03:32,763 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:03:32,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:03:32,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 20:03:32,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 20:03:32,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:03:32,763 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 20:03:32,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:03:32,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 20:03:32,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 20:03:32,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:03:32,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:03:32,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:03:32,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:03:32,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:03:32,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:03:32,823 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:03:32,825 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:03:32,946 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:03:32,951 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:03:32,952 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 20:03:32,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:03:32 BoogieIcfgContainer [2023-04-01 20:03:32,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:03:32,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:03:32,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:03:32,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:03:32,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:03:32" (1/3) ... [2023-04-01 20:03:32,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b7ad8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:03:32, skipping insertion in model container [2023-04-01 20:03:32,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:03:32" (2/3) ... [2023-04-01 20:03:32,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b7ad8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:03:32, skipping insertion in model container [2023-04-01 20:03:32,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:03:32" (3/3) ... [2023-04-01 20:03:32,960 INFO L112 eAbstractionObserver]: Analyzing ICFG s5if.c [2023-04-01 20:03:32,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:03:32,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:03:33,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:03:33,041 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;@78c9543f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:03:33,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:03:33,045 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) [2023-04-01 20:03:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 20:03:33,052 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:33,053 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] [2023-04-01 20:03:33,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:33,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash 863653859, now seen corresponding path program 1 times [2023-04-01 20:03:33,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:33,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071303916] [2023-04-01 20:03:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:33,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:33,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:33,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:33,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:33,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071303916] [2023-04-01 20:03:33,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071303916] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:03:33,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:03:33,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:03:33,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860580428] [2023-04-01 20:03:33,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:03:33,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:03:33,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:03:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 20:03:33,397 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) [2023-04-01 20:03:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:33,469 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-04-01 20:03:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:03:33,486 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 [2023-04-01 20:03:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:33,492 INFO L225 Difference]: With dead ends: 54 [2023-04-01 20:03:33,492 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 20:03:33,495 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 [2023-04-01 20:03:33,497 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:33,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 20:03:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 20:03:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 20:03:33,548 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) [2023-04-01 20:03:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 20:03:33,550 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2023-04-01 20:03:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:33,550 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 20:03:33,550 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) [2023-04-01 20:03:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 20:03:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 20:03:33,551 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:33,551 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] [2023-04-01 20:03:33,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:03:33,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:33,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1121819297, now seen corresponding path program 1 times [2023-04-01 20:03:33,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:33,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681172417] [2023-04-01 20:03:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:33,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:33,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:33,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681172417] [2023-04-01 20:03:33,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681172417] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:03:33,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:03:33,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:03:33,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263934603] [2023-04-01 20:03:33,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:03:33,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:03:33,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:33,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:03:33,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:03:33,758 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) [2023-04-01 20:03:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:33,869 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-04-01 20:03:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:03:33,869 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 [2023-04-01 20:03:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:33,870 INFO L225 Difference]: With dead ends: 40 [2023-04-01 20:03:33,870 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 20:03:33,871 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 [2023-04-01 20:03:33,872 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:33,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:03:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 20:03:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-04-01 20:03:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2023-04-01 20:03:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 20:03:33,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2023-04-01 20:03:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:33,880 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 20:03:33,880 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) [2023-04-01 20:03:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 20:03:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 20:03:33,885 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:33,886 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] [2023-04-01 20:03:33,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:03:33,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:33,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash -667943349, now seen corresponding path program 1 times [2023-04-01 20:03:33,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:33,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674221901] [2023-04-01 20:03:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:33,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:34,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:34,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:34,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:34,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674221901] [2023-04-01 20:03:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674221901] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:34,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231828613] [2023-04-01 20:03:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:34,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:34,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:34,556 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) [2023-04-01 20:03:34,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:03:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:34,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 20:03:34,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:34,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:03:34,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:03:34,912 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 14 treesize of output 16 [2023-04-01 20:03:35,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-04-01 20:03:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:35,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:35,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:03:35,473 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-04-01 20:03:35,479 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 20:03:35,481 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 20 treesize of output 12 [2023-04-01 20:03:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:35,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231828613] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:35,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:35,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 31 [2023-04-01 20:03:35,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646673454] [2023-04-01 20:03:35,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:35,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 20:03:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:35,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 20:03:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=761, Unknown=1, NotChecked=0, Total=930 [2023-04-01 20:03:35,670 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 31 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:03:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:36,316 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-04-01 20:03:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 20:03:36,317 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-04-01 20:03:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:36,319 INFO L225 Difference]: With dead ends: 47 [2023-04-01 20:03:36,319 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 20:03:36,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=1550, Unknown=1, NotChecked=0, Total=1892 [2023-04-01 20:03:36,321 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:36,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 57 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:03:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 20:03:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-04-01 20:03:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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) [2023-04-01 20:03:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-04-01 20:03:36,333 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 26 [2023-04-01 20:03:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:36,333 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-04-01 20:03:36,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:03:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-04-01 20:03:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 20:03:36,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:36,334 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] [2023-04-01 20:03:36,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:03:36,545 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 [2023-04-01 20:03:36,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:36,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:36,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1477289975, now seen corresponding path program 1 times [2023-04-01 20:03:36,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:36,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196059462] [2023-04-01 20:03:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:36,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:36,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:03:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646268514] [2023-04-01 20:03:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:36,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:36,570 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) [2023-04-01 20:03:36,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:03:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:36,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:03:36,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:36,665 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 [2023-04-01 20:03:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:36,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:36,729 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 14 treesize of output 12 [2023-04-01 20:03:36,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-04-01 20:03:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:36,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196059462] [2023-04-01 20:03:36,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:03:36,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646268514] [2023-04-01 20:03:36,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646268514] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:36,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:03:36,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-04-01 20:03:36,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142053428] [2023-04-01 20:03:36,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 20:03:36,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 20:03:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:03:36,753 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:03:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:36,828 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-04-01 20:03:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:03:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-04-01 20:03:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:36,829 INFO L225 Difference]: With dead ends: 50 [2023-04-01 20:03:36,829 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 20:03:36,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:03:36,830 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:36,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 122 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 20:03:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 20:03:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-04-01 20:03:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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) [2023-04-01 20:03:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-04-01 20:03:36,838 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2023-04-01 20:03:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:36,838 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-04-01 20:03:36,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:03:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-04-01 20:03:36,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 20:03:36,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:36,839 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] [2023-04-01 20:03:36,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:37,044 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 [2023-04-01 20:03:37,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:37,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1722810441, now seen corresponding path program 2 times [2023-04-01 20:03:37,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:37,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500832228] [2023-04-01 20:03:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:37,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:37,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:37,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:37,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:37,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500832228] [2023-04-01 20:03:37,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500832228] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:37,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540465902] [2023-04-01 20:03:37,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:03:37,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:37,162 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) [2023-04-01 20:03:37,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:03:37,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:03:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:37,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:03:37,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:37,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:37,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540465902] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:37,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:37,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-04-01 20:03:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466546219] [2023-04-01 20:03:37,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:37,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:03:37,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:37,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:03:37,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:03:37,313 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 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) [2023-04-01 20:03:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:37,447 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2023-04-01 20:03:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:03:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 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 28 [2023-04-01 20:03:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:37,449 INFO L225 Difference]: With dead ends: 45 [2023-04-01 20:03:37,449 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 20:03:37,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:03:37,450 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:37,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 52 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:03:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 20:03:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2023-04-01 20:03:37,456 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) [2023-04-01 20:03:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 20:03:37,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2023-04-01 20:03:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:37,457 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 20:03:37,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 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) [2023-04-01 20:03:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 20:03:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 20:03:37,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:37,458 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:03:37,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:37,664 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 [2023-04-01 20:03:37,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:37,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1559730403, now seen corresponding path program 3 times [2023-04-01 20:03:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:37,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670466065] [2023-04-01 20:03:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:37,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:37,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670466065] [2023-04-01 20:03:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670466065] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709892904] [2023-04-01 20:03:37,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 20:03:37,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:37,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:37,764 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) [2023-04-01 20:03:37,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:03:37,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 20:03:37,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:37,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:03:37,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:37,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:37,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709892904] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:37,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:37,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-04-01 20:03:37,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470252217] [2023-04-01 20:03:37,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:03:37,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:03:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:03:37,921 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) [2023-04-01 20:03:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:38,023 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-04-01 20:03:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:03:38,023 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 [2023-04-01 20:03:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:38,024 INFO L225 Difference]: With dead ends: 49 [2023-04-01 20:03:38,024 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 20:03:38,024 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 [2023-04-01 20:03:38,025 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:38,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 35 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:03:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 20:03:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-04-01 20:03:38,031 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) [2023-04-01 20:03:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-04-01 20:03:38,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2023-04-01 20:03:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:38,032 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-04-01 20:03:38,032 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) [2023-04-01 20:03:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-04-01 20:03:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 20:03:38,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:38,033 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 20:03:38,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:38,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:38,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:38,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1063218725, now seen corresponding path program 4 times [2023-04-01 20:03:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:38,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840124870] [2023-04-01 20:03:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:38,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:38,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:38,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840124870] [2023-04-01 20:03:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840124870] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238954013] [2023-04-01 20:03:38,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 20:03:38,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:38,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:38,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:38,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:03:38,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 20:03:38,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:38,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 20:03:38,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:38,857 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 [2023-04-01 20:03:38,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:03:38,871 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 14 treesize of output 16 [2023-04-01 20:03:38,901 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 14 treesize of output 16 [2023-04-01 20:03:39,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-04-01 20:03:39,122 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 20:03:39,122 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 41 treesize of output 39 [2023-04-01 20:03:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:39,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:39,657 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 5))) (and (forall ((v_main_~i~0_47 Int) (main_~a~0.offset Int) (v_ArrVal_155 (Array Int Int)) (v_main_~i~0_44 Int)) (let ((.cse2 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_155))) (let ((.cse3 (select .cse2 |c_main_~#sum~0.base|))) (let ((.cse1 (select .cse3 |c_main_~#sum~0.offset|))) (or (< .cse0 (+ .cse1 6)) (not (= 5 (select v_ArrVal_155 (+ main_~a~0.offset (* v_main_~i~0_47 4))))) (not (= 5 (select (select (store .cse2 |c_main_~#sum~0.base| (store .cse3 |c_main_~#sum~0.offset| (+ .cse1 5))) c_main_~a~0.base) (+ main_~a~0.offset (* v_main_~i~0_44 4)))))))))) (forall ((v_main_~i~0_47 Int) (main_~a~0.offset Int) (v_ArrVal_155 (Array Int Int)) (v_main_~i~0_44 Int)) (let ((.cse5 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_155))) (let ((.cse6 (select .cse5 |c_main_~#sum~0.base|))) (let ((.cse4 (select .cse6 |c_main_~#sum~0.offset|))) (or (not (= 5 (select v_ArrVal_155 (+ main_~a~0.offset (* v_main_~i~0_47 4))))) (< (+ .cse4 4) .cse0) (not (= 5 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse4 5))) c_main_~a~0.base) (+ main_~a~0.offset (* v_main_~i~0_44 4)))))))))))) is different from false [2023-04-01 20:03:39,688 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 5))) (and (forall ((v_main_~i~0_47 Int) (main_~a~0.offset Int) (v_ArrVal_155 (Array Int Int)) (v_main_~i~0_44 Int)) (let ((.cse2 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_155))) (let ((.cse3 (select .cse2 |c_main_~#sum~0.base|))) (let ((.cse0 (select .cse3 |c_main_~#sum~0.offset|))) (or (< .cse0 (+ .cse1 1)) (not (= 5 (select v_ArrVal_155 (+ main_~a~0.offset (* v_main_~i~0_47 4))))) (not (= 5 (select (select (store .cse2 |c_main_~#sum~0.base| (store .cse3 |c_main_~#sum~0.offset| (+ .cse0 5))) c_main_~a~0.base) (+ main_~a~0.offset (* v_main_~i~0_44 4)))))))))) (forall ((v_main_~i~0_47 Int) (main_~a~0.offset Int) (v_ArrVal_155 (Array Int Int)) (v_main_~i~0_44 Int)) (let ((.cse5 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_155))) (let ((.cse6 (select .cse5 |c_main_~#sum~0.base|))) (let ((.cse4 (select .cse6 |c_main_~#sum~0.offset|))) (or (< .cse1 (+ .cse4 1)) (not (= 5 (select v_ArrVal_155 (+ main_~a~0.offset (* v_main_~i~0_47 4))))) (not (= 5 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse4 5))) c_main_~a~0.base) (+ main_~a~0.offset (* v_main_~i~0_44 4)))))))))))) is different from false [2023-04-01 20:03:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-01 20:03:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238954013] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:39,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 35 [2023-04-01 20:03:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154315112] [2023-04-01 20:03:39,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 20:03:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 20:03:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=943, Unknown=2, NotChecked=126, Total=1190 [2023-04-01 20:03:39,742 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 35 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:03:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:40,634 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2023-04-01 20:03:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 20:03:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-04-01 20:03:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:40,636 INFO L225 Difference]: With dead ends: 52 [2023-04-01 20:03:40,636 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 20:03:40,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=1763, Unknown=2, NotChecked=174, Total=2162 [2023-04-01 20:03:40,637 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:40,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 556 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2023-04-01 20:03:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 20:03:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-04-01 20:03:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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) [2023-04-01 20:03:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-04-01 20:03:40,646 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2023-04-01 20:03:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:40,646 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-04-01 20:03:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:03:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-04-01 20:03:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 20:03:40,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:40,647 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] [2023-04-01 20:03:40,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:40,860 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:40,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 253872099, now seen corresponding path program 1 times [2023-04-01 20:03:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602874057] [2023-04-01 20:03:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:40,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:03:40,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993303205] [2023-04-01 20:03:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:40,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:40,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:40,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:40,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:03:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:40,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 20:03:40,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:40,984 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 [2023-04-01 20:03:41,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:03:41,031 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 14 treesize of output 16 [2023-04-01 20:03:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:41,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:41,091 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_192 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_192) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)))) is different from false [2023-04-01 20:03:41,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:03:41,125 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-04-01 20:03:41,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:03:41,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2023-04-01 20:03:41,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 20:03:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-01 20:03:41,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:41,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602874057] [2023-04-01 20:03:41,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:03:41,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993303205] [2023-04-01 20:03:41,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993303205] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:41,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:03:41,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-04-01 20:03:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224295511] [2023-04-01 20:03:41,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:41,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:03:41,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:03:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=145, Unknown=3, NotChecked=24, Total=210 [2023-04-01 20:03:41,206 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:03:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:41,342 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2023-04-01 20:03:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:03:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-04-01 20:03:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:41,344 INFO L225 Difference]: With dead ends: 53 [2023-04-01 20:03:41,344 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 20:03:41,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=239, Unknown=3, NotChecked=32, Total=342 [2023-04-01 20:03:41,345 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:41,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 160 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 109 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2023-04-01 20:03:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 20:03:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-04-01 20:03:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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) [2023-04-01 20:03:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-04-01 20:03:41,356 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 31 [2023-04-01 20:03:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:41,356 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-04-01 20:03:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:03:41,357 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-04-01 20:03:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 20:03:41,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:41,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:03:41,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:41,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:41,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:41,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash 656866023, now seen corresponding path program 5 times [2023-04-01 20:03:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:41,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93351019] [2023-04-01 20:03:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:41,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:41,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93351019] [2023-04-01 20:03:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93351019] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936859232] [2023-04-01 20:03:41,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 20:03:41,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:41,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:41,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:03:41,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-04-01 20:03:41,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:41,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:03:41,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:41,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:41,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936859232] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:41,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:41,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-04-01 20:03:41,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431348158] [2023-04-01 20:03:41,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:41,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:03:41,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:03:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:03:41,881 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-04-01 20:03:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:42,087 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2023-04-01 20:03:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:03:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 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 33 [2023-04-01 20:03:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:42,094 INFO L225 Difference]: With dead ends: 53 [2023-04-01 20:03:42,094 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 20:03:42,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-04-01 20:03:42,097 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:42,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 70 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:03:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 20:03:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-04-01 20:03:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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) [2023-04-01 20:03:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-04-01 20:03:42,108 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2023-04-01 20:03:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:42,108 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-04-01 20:03:42,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-04-01 20:03:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-04-01 20:03:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 20:03:42,109 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:42,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:03:42,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:42,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:42,317 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:42,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:42,318 INFO L85 PathProgramCache]: Analyzing trace with hash 641786569, now seen corresponding path program 6 times [2023-04-01 20:03:42,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:42,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269434573] [2023-04-01 20:03:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:42,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:42,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:42,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:42,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269434573] [2023-04-01 20:03:42,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269434573] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192409299] [2023-04-01 20:03:42,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 20:03:42,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:42,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:42,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:03:42,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-01 20:03:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:42,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:03:42,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:42,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192409299] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:42,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:42,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-04-01 20:03:42,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682499800] [2023-04-01 20:03:42,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:42,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:03:42,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:42,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:03:42,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:03:42,622 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 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) [2023-04-01 20:03:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:42,782 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-04-01 20:03:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:03:42,782 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 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 34 [2023-04-01 20:03:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:42,783 INFO L225 Difference]: With dead ends: 57 [2023-04-01 20:03:42,783 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 20:03:42,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-04-01 20:03:42,783 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:42,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:03:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 20:03:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2023-04-01 20:03:42,791 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) [2023-04-01 20:03:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-04-01 20:03:42,792 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2023-04-01 20:03:42,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:42,792 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-04-01 20:03:42,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 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) [2023-04-01 20:03:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-04-01 20:03:42,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 20:03:42,793 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:42,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:03:42,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:43,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 20:03:43,001 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:43,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1793718585, now seen corresponding path program 7 times [2023-04-01 20:03:43,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:43,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211284158] [2023-04-01 20:03:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:43,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:43,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:43,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:43,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:43,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211284158] [2023-04-01 20:03:43,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211284158] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:43,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411300205] [2023-04-01 20:03:43,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 20:03:43,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:43,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:43,766 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:43,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 20:03:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:43,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-01 20:03:43,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:43,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:03:43,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:03:43,957 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 14 treesize of output 16 [2023-04-01 20:03:43,996 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 14 treesize of output 16 [2023-04-01 20:03:44,046 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 14 treesize of output 16 [2023-04-01 20:03:44,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-04-01 20:03:44,319 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 20:03:44,320 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 41 treesize of output 39 [2023-04-01 20:03:44,469 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 20:03:44,469 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 41 treesize of output 39 [2023-04-01 20:03:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:44,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:46,133 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 20:03:46,134 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 1 [2023-04-01 20:03:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411300205] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:46,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:46,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 17] total 49 [2023-04-01 20:03:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123839698] [2023-04-01 20:03:46,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:46,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 20:03:46,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 20:03:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 20:03:46,152 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 49 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:03:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:49,459 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-04-01 20:03:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 20:03:49,460 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-04-01 20:03:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:49,460 INFO L225 Difference]: With dead ends: 60 [2023-04-01 20:03:49,460 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 20:03:49,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=404, Invalid=4424, Unknown=2, NotChecked=0, Total=4830 [2023-04-01 20:03:49,463 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 41 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:49,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 119 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1038 Invalid, 5 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:03:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 20:03:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-04-01 20:03:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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) [2023-04-01 20:03:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-04-01 20:03:49,474 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2023-04-01 20:03:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:49,474 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-04-01 20:03:49,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:03:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-04-01 20:03:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 20:03:49,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:49,475 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] [2023-04-01 20:03:49,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:49,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:49,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:49,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1691902085, now seen corresponding path program 2 times [2023-04-01 20:03:49,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:49,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907245707] [2023-04-01 20:03:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:49,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:03:49,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031095591] [2023-04-01 20:03:49,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:03:49,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:49,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:49,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:49,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 20:03:49,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:03:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:49,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 20:03:49,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:49,823 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 [2023-04-01 20:03:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:03:49,883 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 14 treesize of output 16 [2023-04-01 20:03:49,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:03:49,920 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 14 treesize of output 16 [2023-04-01 20:03:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:49,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:50,044 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_353 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_353) c_main_~a~0.base) (+ c_main_~a~0.offset 8)) 5)) is different from false [2023-04-01 20:03:50,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:03:50,052 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-04-01 20:03:50,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:03:50,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2023-04-01 20:03:50,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 20:03:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-04-01 20:03:50,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:50,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907245707] [2023-04-01 20:03:50,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:03:50,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031095591] [2023-04-01 20:03:50,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031095591] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:50,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:03:50,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-04-01 20:03:50,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471773356] [2023-04-01 20:03:50,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:50,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 20:03:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 20:03:50,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=4, NotChecked=32, Total=342 [2023-04-01 20:03:50,127 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:03:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:50,324 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-04-01 20:03:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:03:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-04-01 20:03:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:50,325 INFO L225 Difference]: With dead ends: 61 [2023-04-01 20:03:50,325 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 20:03:50,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=4, NotChecked=42, Total=552 [2023-04-01 20:03:50,325 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:50,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 186 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 211 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2023-04-01 20:03:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 20:03:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-04-01 20:03:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 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) [2023-04-01 20:03:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-04-01 20:03:50,336 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 36 [2023-04-01 20:03:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:50,336 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-04-01 20:03:50,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:03:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-04-01 20:03:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 20:03:50,337 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:50,337 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:03:50,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:50,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 20:03:50,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:50,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:50,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1556995259, now seen corresponding path program 8 times [2023-04-01 20:03:50,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:50,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270380012] [2023-04-01 20:03:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:50,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:50,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:50,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:50,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270380012] [2023-04-01 20:03:50,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270380012] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:50,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422418120] [2023-04-01 20:03:50,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:03:50,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:50,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:50,700 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:50,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 20:03:50,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:03:50,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:50,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 20:03:50,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:50,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:50,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422418120] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:50,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:50,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-04-01 20:03:50,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404543994] [2023-04-01 20:03:50,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:50,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 20:03:50,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 20:03:50,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:03:50,955 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 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) [2023-04-01 20:03:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:51,185 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-04-01 20:03:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 20:03:51,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 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 38 [2023-04-01 20:03:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:51,186 INFO L225 Difference]: With dead ends: 61 [2023-04-01 20:03:51,186 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 20:03:51,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2023-04-01 20:03:51,187 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:51,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 73 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:03:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 20:03:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2023-04-01 20:03:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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) [2023-04-01 20:03:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-04-01 20:03:51,196 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 38 [2023-04-01 20:03:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:51,196 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-04-01 20:03:51,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 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) [2023-04-01 20:03:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-04-01 20:03:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 20:03:51,197 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:51,197 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:03:51,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:51,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 20:03:51,403 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:51,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1305678105, now seen corresponding path program 9 times [2023-04-01 20:03:51,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:51,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791210082] [2023-04-01 20:03:51,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:51,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:51,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:51,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:51,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:51,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791210082] [2023-04-01 20:03:51,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791210082] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:51,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965542555] [2023-04-01 20:03:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 20:03:51,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:51,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:51,545 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:51,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 20:03:51,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 20:03:51,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:51,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 20:03:51,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:51,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:51,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965542555] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:51,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:51,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-04-01 20:03:51,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167637060] [2023-04-01 20:03:51,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:51,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 20:03:51,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:51,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 20:03:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:03:51,817 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 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) [2023-04-01 20:03:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:03:51,981 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-04-01 20:03:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 20:03:51,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 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 39 [2023-04-01 20:03:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:03:51,982 INFO L225 Difference]: With dead ends: 65 [2023-04-01 20:03:51,982 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 20:03:51,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-04-01 20:03:51,983 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:03:51,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:03:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 20:03:51,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-04-01 20:03:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2023-04-01 20:03:51,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-04-01 20:03:51,991 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2023-04-01 20:03:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:03:51,991 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-04-01 20:03:51,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 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) [2023-04-01 20:03:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-04-01 20:03:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 20:03:51,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:03:51,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:03:52,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 20:03:52,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 20:03:52,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:03:52,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:03:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1417373271, now seen corresponding path program 10 times [2023-04-01 20:03:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:03:52,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104688111] [2023-04-01 20:03:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:03:52,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:03:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:53,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:03:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:53,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:03:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:03:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:03:53,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:03:53,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104688111] [2023-04-01 20:03:53,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104688111] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:03:53,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528021183] [2023-04-01 20:03:53,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 20:03:53,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:03:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:03:53,258 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:03:53,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 20:03:53,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 20:03:53,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:03:53,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-01 20:03:53,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:03:53,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:03:53,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:03:53,387 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 14 treesize of output 16 [2023-04-01 20:03:53,398 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 14 treesize of output 16 [2023-04-01 20:03:53,407 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 14 treesize of output 16 [2023-04-01 20:03:53,417 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 14 treesize of output 16 [2023-04-01 20:03:53,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 20:03:53,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:03:53,605 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 35 treesize of output 33 [2023-04-01 20:03:53,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:03:53,737 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 44 treesize of output 45 [2023-04-01 20:03:53,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:03:53,904 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 53 treesize of output 57 [2023-04-01 20:03:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:03:54,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:03:57,927 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse1 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 5 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (< 0 (+ .cse2 1)) (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 10 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 15 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 5 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 10 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (< .cse5 1) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 15 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5)))))))) is different from false [2023-04-01 20:03:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 7 not checked. [2023-04-01 20:03:58,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528021183] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:03:58,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:03:58,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 21] total 57 [2023-04-01 20:03:58,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378039598] [2023-04-01 20:03:58,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:03:58,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-04-01 20:03:58,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:03:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-04-01 20:03:58,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2856, Unknown=1, NotChecked=108, Total=3192 [2023-04-01 20:03:58,825 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 57 states, 55 states have (on average 1.4) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:02,171 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse1 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 5 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (< 0 (+ .cse2 1)) (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 10 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 15 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (= c_main_~i~0 0) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) 0) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 5 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 10 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (< .cse5 1) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 15 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5)))))))) is different from false [2023-04-01 20:04:06,129 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_main_~i~0 1) (<= 1 c_main_~i~0) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse1 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 5 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (< 0 (+ .cse2 1)) (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 10 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 15 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) 0) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 5 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 10 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (< .cse5 1) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 15 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5)))))))) is different from false [2023-04-01 20:04:10,052 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse1 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 5 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (< 0 (+ .cse2 1)) (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 10 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 15 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (<= 2 c_main_~i~0) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) 0) (<= c_main_~i~0 2) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 5 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 10 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (< .cse5 1) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 15 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5)))))))) is different from false [2023-04-01 20:04:13,847 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse1 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 5 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (< 0 (+ .cse2 1)) (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 10 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 15 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (<= c_main_~i~0 3) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) 0) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 5 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 10 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (< .cse5 1) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 15 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (<= 3 c_main_~i~0)) is different from false [2023-04-01 20:04:17,798 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse1 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 5 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (< 0 (+ .cse2 1)) (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 10 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 15 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (<= c_main_~i~0 3) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) 0) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 5 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 10 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (< .cse5 1) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 15 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (<= 4 c_~N~0)) is different from false [2023-04-01 20:04:21,909 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse1 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 5 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (< 0 (+ .cse2 1)) (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 10 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 15 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (<= c_main_~i~0 4) (= (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) 0) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 5 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 10 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (< .cse5 1) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 15 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (<= 4 c_~N~0)) is different from false [2023-04-01 20:04:25,950 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse1 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 5 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (< 0 (+ .cse2 1)) (not (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 10 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |c_main_~#sum~0.offset| (+ 15 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5))))))) (not (= |c_main_~#sum~0.base| c_main_~a~0.base)) (= (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) 0) (forall ((v_ArrVal_490 (Array Int Int)) (main_~a~0.offset Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_490))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (or (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 5 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 4)))) (not (= 5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 10 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 8)))) (< .cse5 1) (not (= (select v_ArrVal_490 main_~a~0.offset) 5)) (not (= (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ 15 .cse5))) c_main_~a~0.base) (+ main_~a~0.offset 12)) 5)))))))) is different from false [2023-04-01 20:04:40,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 20:04:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:47,372 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2023-04-01 20:04:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 20:04:47,372 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.4) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-04-01 20:04:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:47,375 INFO L225 Difference]: With dead ends: 76 [2023-04-01 20:04:47,375 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 20:04:47,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=705, Invalid=7509, Unknown=8, NotChecked=1480, Total=9702 [2023-04-01 20:04:47,379 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:47,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 191 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 966 Invalid, 1 Unknown, 743 Unchecked, 7.7s Time] [2023-04-01 20:04:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 20:04:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2023-04-01 20:04:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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) [2023-04-01 20:04:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-04-01 20:04:47,394 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 41 [2023-04-01 20:04:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:47,395 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-04-01 20:04:47,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.4) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-04-01 20:04:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 20:04:47,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:47,397 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:04:47,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 20:04:47,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 20:04:47,605 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:04:47,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:04:47,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2068247399, now seen corresponding path program 3 times [2023-04-01 20:04:47,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:04:47,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081660184] [2023-04-01 20:04:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:04:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:04:47,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:04:47,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975834224] [2023-04-01 20:04:47,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 20:04:47,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:04:47,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:04:47,617 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:04:47,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 20:04:47,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 20:04:47,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:04:47,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 20:04:47,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:04:47,911 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 [2023-04-01 20:04:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:04:48,451 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 18 treesize of output 20 [2023-04-01 20:04:48,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:04:48,643 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 18 treesize of output 20 [2023-04-01 20:04:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:04:48,827 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 18 treesize of output 20 [2023-04-01 20:04:49,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:04:49,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-04-01 20:04:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:04:49,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:04:49,791 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int) (v_ArrVal_549 (Array Int Int))) (or (<= (+ main_~i~0 2) c_~N~0) (<= c_~N~0 main_~i~0) (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_549) c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)))))) is different from false [2023-04-01 20:04:50,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:04:50,489 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-04-01 20:04:50,540 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 20:04:50,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2023-04-01 20:04:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 13 not checked. [2023-04-01 20:04:50,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:04:50,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081660184] [2023-04-01 20:04:50,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:04:50,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975834224] [2023-04-01 20:04:50,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975834224] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:04:50,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:04:50,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2023-04-01 20:04:50,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97108011] [2023-04-01 20:04:50,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:04:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 20:04:50,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:04:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 20:04:50,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=4, NotChecked=26, Total=240 [2023-04-01 20:04:50,703 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:04:59,961 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-04-01 20:04:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:04:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-04-01 20:04:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:04:59,962 INFO L225 Difference]: With dead ends: 51 [2023-04-01 20:04:59,962 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 20:04:59,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=4, NotChecked=36, Total=420 [2023-04-01 20:04:59,963 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:04:59,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 12 Unchecked, 0.5s Time] [2023-04-01 20:04:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 20:04:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-01 20:04:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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) [2023-04-01 20:04:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-04-01 20:04:59,975 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 41 [2023-04-01 20:04:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:04:59,975 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-04-01 20:04:59,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:04:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-04-01 20:04:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 20:04:59,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:04:59,975 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:04:59,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 20:05:00,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:00,177 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:05:00,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:05:00,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1233993287, now seen corresponding path program 4 times [2023-04-01 20:05:00,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:05:00,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862133886] [2023-04-01 20:05:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:05:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:05:00,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:05:00,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663667935] [2023-04-01 20:05:00,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 20:05:00,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:00,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:05:00,188 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:05:00,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 20:05:00,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 20:05:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:05:00,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 20:05:00,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:05:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:05:01,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:05:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:05:02,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:05:02,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862133886] [2023-04-01 20:05:02,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:05:02,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663667935] [2023-04-01 20:05:02,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663667935] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:05:02,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:05:02,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-04-01 20:05:02,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443768698] [2023-04-01 20:05:02,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:05:02,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 20:05:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:05:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 20:05:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:05:02,253 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:05:03,693 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2023-04-01 20:05:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 20:05:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-04-01 20:05:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:05:03,694 INFO L225 Difference]: With dead ends: 90 [2023-04-01 20:05:03,694 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 20:05:03,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-04-01 20:05:03,695 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:05:03,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 108 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 20:05:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 20:05:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2023-04-01 20:05:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 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) [2023-04-01 20:05:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-04-01 20:05:03,707 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 44 [2023-04-01 20:05:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:05:03,707 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-04-01 20:05:03,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-04-01 20:05:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 20:05:03,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:05:03,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:05:03,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-01 20:05:03,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 20:05:03,911 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:05:03,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:05:03,912 INFO L85 PathProgramCache]: Analyzing trace with hash -243532603, now seen corresponding path program 5 times [2023-04-01 20:05:03,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:05:03,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688034366] [2023-04-01 20:05:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:05:03,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:05:03,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:05:03,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174176659] [2023-04-01 20:05:03,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 20:05:03,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:03,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:05:03,923 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:05:03,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 20:05:04,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-04-01 20:05:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:05:04,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 20:05:04,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:05:04,631 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 [2023-04-01 20:05:04,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:05:04,977 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 21 treesize of output 20 [2023-04-01 20:05:05,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 20:05:05,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 20:05:05,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 20:05:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 20:05:06,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:05:11,495 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 296 treesize of output 284 [2023-04-01 20:05:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 20:05:12,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:05:12,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688034366] [2023-04-01 20:05:12,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:05:12,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174176659] [2023-04-01 20:05:12,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174176659] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:05:12,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:05:12,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2023-04-01 20:05:12,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035237026] [2023-04-01 20:05:12,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:05:12,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 20:05:12,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:05:12,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 20:05:12,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=659, Unknown=1, NotChecked=0, Total=756 [2023-04-01 20:05:12,696 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:05:16,307 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2023-04-01 20:05:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 20:05:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-04-01 20:05:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:05:16,308 INFO L225 Difference]: With dead ends: 62 [2023-04-01 20:05:16,308 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 20:05:16,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=130, Invalid=925, Unknown=1, NotChecked=0, Total=1056 [2023-04-01 20:05:16,309 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:05:16,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 284 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 20:05:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 20:05:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-04-01 20:05:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 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) [2023-04-01 20:05:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-04-01 20:05:16,322 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 46 [2023-04-01 20:05:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:05:16,322 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-04-01 20:05:16,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-04-01 20:05:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 20:05:16,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:05:16,323 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:05:16,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 20:05:16,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 20:05:16,524 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:05:16,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:05:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1786240403, now seen corresponding path program 6 times [2023-04-01 20:05:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:05:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056176203] [2023-04-01 20:05:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:05:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:05:16,538 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:05:16,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310080298] [2023-04-01 20:05:16,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 20:05:16,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:16,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:05:16,540 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:05:16,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 20:05:16,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-01 20:05:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:05:16,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 20:05:16,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:05:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:05:18,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:05:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:05:19,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:05:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056176203] [2023-04-01 20:05:19,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:05:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310080298] [2023-04-01 20:05:19,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310080298] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:05:19,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:05:19,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-04-01 20:05:19,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664546571] [2023-04-01 20:05:19,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:05:19,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 20:05:19,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:05:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 20:05:19,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-04-01 20:05:19,326 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:05:21,048 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2023-04-01 20:05:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 20:05:21,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-04-01 20:05:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:05:21,049 INFO L225 Difference]: With dead ends: 98 [2023-04-01 20:05:21,050 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 20:05:21,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-04-01 20:05:21,051 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:05:21,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 118 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 20:05:21,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 20:05:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2023-04-01 20:05:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 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) [2023-04-01 20:05:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-04-01 20:05:21,064 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 49 [2023-04-01 20:05:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:05:21,064 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-04-01 20:05:21,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-04-01 20:05:21,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:05:21,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:05:21,065 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:05:21,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-01 20:05:21,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:21,266 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:05:21,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:05:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1037909329, now seen corresponding path program 7 times [2023-04-01 20:05:21,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:05:21,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306421924] [2023-04-01 20:05:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:05:21,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:05:21,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:05:21,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530025152] [2023-04-01 20:05:21,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 20:05:21,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:05:21,281 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:05:21,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-01 20:05:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:05:21,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 20:05:21,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:05:21,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:05:22,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:05:22,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-04-01 20:05:23,008 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 14 treesize of output 16 [2023-04-01 20:05:23,326 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 14 treesize of output 16 [2023-04-01 20:05:23,651 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 14 treesize of output 16 [2023-04-01 20:05:23,999 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 14 treesize of output 16 [2023-04-01 20:05:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 20:05:24,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:05:26,463 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 4))) (or (forall ((v_ArrVal_795 (Array Int Int))) (not (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_795) c_main_~a~0.base) (+ .cse0 c_main_~a~0.offset 12))))) (forall ((v_ArrVal_794 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_794) c_main_~a~0.base) (+ .cse0 c_main_~a~0.offset 8)) 5)))) is different from false [2023-04-01 20:05:27,442 WARN L839 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_794 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_794) c_main_~a~0.base) (+ c_main_~a~0.offset 16)) 5)) (forall ((v_ArrVal_795 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_795) c_main_~a~0.base) (+ c_main_~a~0.offset 20)) 5)))) is different from false [2023-04-01 20:05:27,992 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_795 (Array Int Int)) (v_ArrVal_789 Int) (v_ArrVal_794 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4) v_ArrVal_789)))) (or (= 5 (select (select (store .cse0 |c_main_~#sum~0.base| v_ArrVal_794) c_main_~a~0.base) (+ c_main_~a~0.offset 16))) (not (= (select (select (store .cse0 |c_main_~#sum~0.base| v_ArrVal_795) c_main_~a~0.base) (+ c_main_~a~0.offset 20)) 5))))) is different from false [2023-04-01 20:05:28,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:05:28,072 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 51 [2023-04-01 20:05:28,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:05:28,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 62 [2023-04-01 20:05:28,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 20:05:28,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-04-01 20:05:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 29 not checked. [2023-04-01 20:05:29,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:05:29,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306421924] [2023-04-01 20:05:29,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:05:29,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530025152] [2023-04-01 20:05:29,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530025152] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:05:29,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:05:29,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2023-04-01 20:05:29,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854127894] [2023-04-01 20:05:29,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:05:29,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 20:05:29,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:05:29,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 20:05:29,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=760, Unknown=22, NotChecked=174, Total=1056 [2023-04-01 20:05:29,738 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:05:44,772 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2023-04-01 20:05:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 20:05:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-04-01 20:05:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:05:44,773 INFO L225 Difference]: With dead ends: 82 [2023-04-01 20:05:44,773 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 20:05:44,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=151, Invalid=1245, Unknown=22, NotChecked=222, Total=1640 [2023-04-01 20:05:44,774 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:05:44,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 394 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 760 Invalid, 0 Unknown, 146 Unchecked, 4.5s Time] [2023-04-01 20:05:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 20:05:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2023-04-01 20:05:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 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) [2023-04-01 20:05:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2023-04-01 20:05:44,787 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2023-04-01 20:05:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:05:44,787 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2023-04-01 20:05:44,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2023-04-01 20:05:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 20:05:44,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:05:44,788 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:05:44,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-01 20:05:44,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:44,988 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:05:44,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:05:44,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1793483709, now seen corresponding path program 8 times [2023-04-01 20:05:44,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:05:44,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105295280] [2023-04-01 20:05:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:05:44,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:05:44,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:05:44,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752622204] [2023-04-01 20:05:44,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:05:44,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:45,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:05:45,001 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:05:45,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-01 20:05:45,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:05:45,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:05:45,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 20:05:45,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:05:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:05:46,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:05:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:05:48,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:05:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105295280] [2023-04-01 20:05:48,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:05:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752622204] [2023-04-01 20:05:48,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752622204] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:05:48,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:05:48,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-04-01 20:05:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558923821] [2023-04-01 20:05:48,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:05:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 20:05:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:05:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 20:05:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-04-01 20:05:48,330 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:05:50,372 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2023-04-01 20:05:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 20:05:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-04-01 20:05:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:05:50,374 INFO L225 Difference]: With dead ends: 106 [2023-04-01 20:05:50,374 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 20:05:50,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2023-04-01 20:05:50,375 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:05:50,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 151 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:05:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 20:05:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2023-04-01 20:05:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 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) [2023-04-01 20:05:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2023-04-01 20:05:50,391 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 54 [2023-04-01 20:05:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:05:50,391 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2023-04-01 20:05:50,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:05:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2023-04-01 20:05:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 20:05:50,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:05:50,392 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:05:50,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-04-01 20:05:50,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:50,593 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:05:50,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:05:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1329408703, now seen corresponding path program 9 times [2023-04-01 20:05:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:05:50,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006346472] [2023-04-01 20:05:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:05:50,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:05:50,605 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:05:50,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77564379] [2023-04-01 20:05:50,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 20:05:50,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:05:50,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:05:50,606 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:05:50,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-01 20:05:50,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 20:05:50,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:05:50,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 20:05:50,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:05:51,043 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 [2023-04-01 20:05:51,217 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 28 treesize of output 27 [2023-04-01 20:05:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:05:51,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:05:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:05:51,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:05:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:05:52,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:05:52,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:05:52,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:05:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:05:52,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:05:52,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:05:52,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-04-01 20:05:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 20:05:53,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:05:57,329 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_288 Int) (v_ArrVal_934 Int) (v_ArrVal_940 (Array Int Int))) (let ((.cse0 (+ v_main_~i~0_288 1))) (or (< .cse0 c_main_~i~0) (= 5 (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset) v_ArrVal_934)) |c_main_~#sum~0.base| v_ArrVal_940) c_main_~a~0.base) (+ c_main_~a~0.offset (* 4 v_main_~i~0_288)))) (< c_main_~i~0 .cse0)))) is different from false [2023-04-01 20:05:57,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:05:57,864 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2023-04-01 20:05:57,916 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 20:05:57,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2023-04-01 20:06:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 51 trivial. 7 not checked. [2023-04-01 20:06:00,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:00,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006346472] [2023-04-01 20:06:00,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:06:00,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77564379] [2023-04-01 20:06:00,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77564379] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:06:00,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:06:00,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2023-04-01 20:06:00,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865140591] [2023-04-01 20:06:00,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:06:00,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 20:06:00,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 20:06:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=295, Unknown=13, NotChecked=36, Total=420 [2023-04-01 20:06:00,204 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:06:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:06:06,038 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-04-01 20:06:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 20:06:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2023-04-01 20:06:06,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:06:06,039 INFO L225 Difference]: With dead ends: 68 [2023-04-01 20:06:06,039 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 20:06:06,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=272, Invalid=775, Unknown=13, NotChecked=62, Total=1122 [2023-04-01 20:06:06,040 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:06:06,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 132 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 196 Invalid, 0 Unknown, 23 Unchecked, 1.3s Time] [2023-04-01 20:06:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 20:06:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2023-04-01 20:06:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 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) [2023-04-01 20:06:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-04-01 20:06:06,062 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 56 [2023-04-01 20:06:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:06:06,062 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-04-01 20:06:06,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:06:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-04-01 20:06:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:06:06,063 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:06,063 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:06:06,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-04-01 20:06:06,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-01 20:06:06,270 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:06,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1155323437, now seen corresponding path program 10 times [2023-04-01 20:06:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:06,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631556892] [2023-04-01 20:06:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:06,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:06,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:06:06,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940109401] [2023-04-01 20:06:06,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 20:06:06,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:06,284 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:06:06,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-01 20:06:06,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 20:06:06,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:06:06,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 20:06:06,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:06:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:06:08,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:06:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:06:10,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:10,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631556892] [2023-04-01 20:06:10,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:06:10,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940109401] [2023-04-01 20:06:10,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940109401] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:06:10,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:06:10,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-04-01 20:06:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115707324] [2023-04-01 20:06:10,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:06:10,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 20:06:10,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 20:06:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2023-04-01 20:06:10,457 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:06:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:06:12,592 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2023-04-01 20:06:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 20:06:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 59 [2023-04-01 20:06:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:06:12,593 INFO L225 Difference]: With dead ends: 132 [2023-04-01 20:06:12,593 INFO L226 Difference]: Without dead ends: 85 [2023-04-01 20:06:12,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=324, Invalid=936, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 20:06:12,594 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 95 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:06:12,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 86 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 20:06:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-01 20:06:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2023-04-01 20:06:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 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) [2023-04-01 20:06:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2023-04-01 20:06:12,616 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2023-04-01 20:06:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:06:12,617 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2023-04-01 20:06:12,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:06:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2023-04-01 20:06:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 20:06:12,617 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:12,617 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:06:12,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-04-01 20:06:12,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-04-01 20:06:12,818 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:12,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1269140463, now seen corresponding path program 11 times [2023-04-01 20:06:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:12,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983435594] [2023-04-01 20:06:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:12,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:06:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840755479] [2023-04-01 20:06:12,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 20:06:12,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:12,831 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:06:12,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-04-01 20:06:13,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-04-01 20:06:13,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:06:13,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 20:06:13,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:06:13,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:06:14,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:06:14,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-04-01 20:06:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:06:14,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 20:06:15,421 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 14 treesize of output 16 [2023-04-01 20:06:15,774 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 14 treesize of output 16 [2023-04-01 20:06:16,116 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 14 treesize of output 16 [2023-04-01 20:06:16,478 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 14 treesize of output 16 [2023-04-01 20:06:16,808 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 14 treesize of output 16 [2023-04-01 20:06:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 45 proven. 104 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:06:17,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:06:17,866 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1105 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1105) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)))) is different from false [2023-04-01 20:06:17,912 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1105 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1105) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 8)))) is different from false [2023-04-01 20:06:17,990 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1105 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1105) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 12)))) is different from false [2023-04-01 20:06:22,628 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1097 Int) (v_ArrVal_1099 Int) (v_ArrVal_1105 (Array Int Int)) (v_main_~i~0_349 Int)) (or (= 5 (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset) v_ArrVal_1097) (+ (* 4 v_main_~i~0_349) c_main_~a~0.offset) v_ArrVal_1099)) |c_main_~#sum~0.base| v_ArrVal_1105) c_main_~a~0.base) (+ c_main_~a~0.offset 20))) (< v_main_~i~0_349 (+ c_main_~i~0 1)))) is different from false [2023-04-01 20:06:49,345 INFO L321 Elim1Store]: treesize reduction 47, result has 44.7 percent of original size [2023-04-01 20:06:49,346 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 50 [2023-04-01 20:06:49,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:06:49,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2023-04-01 20:06:49,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 20:06:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 46 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 39 not checked. [2023-04-01 20:06:51,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:51,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983435594] [2023-04-01 20:06:51,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:06:51,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840755479] [2023-04-01 20:06:51,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840755479] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:06:51,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:06:51,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2023-04-01 20:06:51,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204527150] [2023-04-01 20:06:51,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:06:51,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 20:06:51,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:51,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 20:06:51,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=975, Unknown=31, NotChecked=268, Total=1406 [2023-04-01 20:06:51,109 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:06:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:06:58,528 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-04-01 20:06:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 20:06:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2023-04-01 20:06:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:06:58,529 INFO L225 Difference]: With dead ends: 84 [2023-04-01 20:06:58,529 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 20:06:58,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=187, Invalid=1520, Unknown=31, NotChecked=332, Total=2070 [2023-04-01 20:06:58,530 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:06:58,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 422 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 969 Invalid, 0 Unknown, 185 Unchecked, 5.5s Time] [2023-04-01 20:06:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 20:06:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2023-04-01 20:06:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 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) [2023-04-01 20:06:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-04-01 20:06:58,549 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 61 [2023-04-01 20:06:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:06:58,550 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-04-01 20:06:58,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:06:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-04-01 20:06:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 20:06:58,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:58,550 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:06:58,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-04-01 20:06:58,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:58,758 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:58,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1674752005, now seen corresponding path program 12 times [2023-04-01 20:06:58,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:58,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445088989] [2023-04-01 20:06:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:58,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:06:58,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553290059] [2023-04-01 20:06:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 20:06:58,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:58,772 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:06:58,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-04-01 20:06:59,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-04-01 20:06:59,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:06:59,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 20:06:59,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:07:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:07:01,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:07:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:07:03,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:07:03,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445088989] [2023-04-01 20:07:03,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:07:03,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553290059] [2023-04-01 20:07:03,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553290059] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:07:03,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:07:03,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2023-04-01 20:07:03,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262735312] [2023-04-01 20:07:03,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:07:03,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 20:07:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:07:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 20:07:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2023-04-01 20:07:03,726 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:07:06,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:07:06,073 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2023-04-01 20:07:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 20:07:06,073 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 64 [2023-04-01 20:07:06,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:07:06,074 INFO L225 Difference]: With dead ends: 140 [2023-04-01 20:07:06,074 INFO L226 Difference]: Without dead ends: 90 [2023-04-01 20:07:06,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 20:07:06,075 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:07:06,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 123 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:07:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-01 20:07:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2023-04-01 20:07:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 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) [2023-04-01 20:07:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-04-01 20:07:06,092 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 64 [2023-04-01 20:07:06,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:07:06,093 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-04-01 20:07:06,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:07:06,093 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-04-01 20:07:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 20:07:06,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:07:06,093 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:07:06,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-04-01 20:07:06,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:07:06,300 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:07:06,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:07:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1164319879, now seen corresponding path program 13 times [2023-04-01 20:07:06,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:07:06,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201588730] [2023-04-01 20:07:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:07:06,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:07:06,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:07:06,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851925936] [2023-04-01 20:07:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 20:07:06,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:07:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:07:06,317 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:07:06,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-04-01 20:07:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:07:06,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-01 20:07:06,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:07:06,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 20:07:07,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 20:07:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:07,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 20:07:08,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:08,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-04-01 20:07:09,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-04-01 20:07:09,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-04-01 20:07:10,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-04-01 20:07:10,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-04-01 20:07:10,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-04-01 20:07:11,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-04-01 20:07:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 54 proven. 137 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:07:12,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:07:12,739 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1286) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)))) is different from false [2023-04-01 20:07:12,784 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1286) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 8)))) is different from false [2023-04-01 20:07:22,282 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_418 Int)) (or (forall ((v_ArrVal_1279 Int) (v_ArrVal_1286 (Array Int Int)) (v_main_~i~0_417 Int)) (or (= 5 (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (store (select |c_#memory_int| c_main_~a~0.base) (+ (* 4 v_main_~i~0_418) c_main_~a~0.offset) 5) (+ (* 4 v_main_~i~0_417) c_main_~a~0.offset) v_ArrVal_1279)) |c_main_~#sum~0.base| v_ArrVal_1286) c_main_~a~0.base) (+ c_main_~a~0.offset 24))) (< v_main_~i~0_417 (+ v_main_~i~0_418 1)))) (< v_main_~i~0_418 (+ c_main_~i~0 1)))) is different from false [2023-04-01 20:07:22,488 INFO L321 Elim1Store]: treesize reduction 66, result has 35.9 percent of original size [2023-04-01 20:07:22,488 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2023-04-01 20:07:22,672 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-04-01 20:07:22,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 44 [2023-04-01 20:07:22,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 20:07:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 53 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 35 not checked. [2023-04-01 20:07:24,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:07:24,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201588730] [2023-04-01 20:07:24,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:07:24,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851925936] [2023-04-01 20:07:24,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851925936] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:07:24,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:07:24,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2023-04-01 20:07:24,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548112626] [2023-04-01 20:07:24,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:07:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-01 20:07:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:07:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-01 20:07:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1387, Unknown=28, NotChecked=234, Total=1806 [2023-04-01 20:07:24,980 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:07:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:07:33,595 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2023-04-01 20:07:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 20:07:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 66 [2023-04-01 20:07:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:07:33,596 INFO L225 Difference]: With dead ends: 85 [2023-04-01 20:07:33,596 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 20:07:33,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=233, Invalid=2201, Unknown=28, NotChecked=294, Total=2756 [2023-04-01 20:07:33,598 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:07:33,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 408 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1095 Invalid, 0 Unknown, 144 Unchecked, 6.3s Time] [2023-04-01 20:07:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 20:07:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2023-04-01 20:07:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 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) [2023-04-01 20:07:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2023-04-01 20:07:33,621 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 66 [2023-04-01 20:07:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:07:33,621 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2023-04-01 20:07:33,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:07:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2023-04-01 20:07:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 20:07:33,622 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:07:33,622 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:07:33,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-04-01 20:07:33,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-04-01 20:07:33,828 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:07:33,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:07:33,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2138811343, now seen corresponding path program 14 times [2023-04-01 20:07:33,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:07:33,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436583618] [2023-04-01 20:07:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:07:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:07:33,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:07:33,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240860827] [2023-04-01 20:07:33,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:07:33,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:07:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:07:33,842 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:07:33,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-04-01 20:07:33,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:07:33,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:07:33,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 20:07:33,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:07:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:07:36,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:07:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:07:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:07:39,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436583618] [2023-04-01 20:07:39,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:07:39,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240860827] [2023-04-01 20:07:39,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240860827] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:07:39,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:07:39,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2023-04-01 20:07:39,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715290268] [2023-04-01 20:07:39,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:07:39,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 20:07:39,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:07:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 20:07:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 20:07:39,187 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:07:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:07:42,273 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2023-04-01 20:07:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 20:07:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 69 [2023-04-01 20:07:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:07:42,274 INFO L225 Difference]: With dead ends: 148 [2023-04-01 20:07:42,274 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 20:07:42,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 20:07:42,275 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:07:42,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 112 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:07:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 20:07:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2023-04-01 20:07:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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) [2023-04-01 20:07:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2023-04-01 20:07:42,296 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2023-04-01 20:07:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:07:42,296 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2023-04-01 20:07:42,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:07:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2023-04-01 20:07:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 20:07:42,297 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:07:42,297 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:07:42,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-04-01 20:07:42,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-04-01 20:07:42,498 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:07:42,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:07:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash 889077619, now seen corresponding path program 15 times [2023-04-01 20:07:42,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:07:42,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144897812] [2023-04-01 20:07:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:07:42,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:07:42,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:07:42,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805935969] [2023-04-01 20:07:42,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 20:07:42,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:07:42,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:07:42,514 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:07:42,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-04-01 20:07:42,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-01 20:07:42,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:07:42,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 20:07:42,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:07:43,004 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 [2023-04-01 20:07:43,172 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 28 treesize of output 27 [2023-04-01 20:07:43,314 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 28 treesize of output 27 [2023-04-01 20:07:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:43,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:07:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:44,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:07:44,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:44,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:07:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:44,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:07:44,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:44,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:07:44,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:44,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:07:44,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 20:07:44,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 20:07:45,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 20:07:45,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-04-01 20:07:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-04-01 20:07:45,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:07:46,630 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int) (v_ArrVal_1483 (Array Int Int))) (or (<= c_~N~0 (+ main_~i~0 2)) (= 5 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1483) c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)))) (<= (+ main_~i~0 4) c_~N~0))) is different from false