/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/ss1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:06:01,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:06:01,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:06:01,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 20:06:01,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 20:06:01,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 20:06:01,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 20:06:01,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 20:06:01,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 20:06:01,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 20:06:01,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 20:06:01,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 20:06:01,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:06:01,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:06:01,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:06:01,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:06:01,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:06:01,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:06:01,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:06:01,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:06:01,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:06:01,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:06:01,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:06:01,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:06:01,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 20:06:01,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 20:06:01,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 20:06:01,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 20:06:01,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 20:06:01,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 20:06:01,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 20:06:01,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 20:06:01,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 20:06:01,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:06:01,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:06:01,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:06:01,505 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 20:06:01,526 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:06:01,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:06:01,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:06:01,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:06:01,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:06:01,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:06:01,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:06:01,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:06:01,528 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:06:01,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:06:01,529 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:06:01,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:06:01,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:06:01,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:06:01,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:06:01,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:06:01,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:06:01,530 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:06:01,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:06:01,530 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:06:01,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:06:01,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:06:01,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:06:01,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:06:01,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:06:01,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:06:01,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:06:01,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:06:01,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:06:01,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:06:01,531 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:06:01,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:06:01,531 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:06:01,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:06:01,531 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:06:01,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:06:01,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:06:01,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:06:01,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:06:01,730 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:06:01,730 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:06:01,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ss1.c [2023-04-01 20:06:02,659 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:06:02,825 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:06:02,826 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss1.c [2023-04-01 20:06:02,830 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/504f13574/28fb35e1f2694db89e318e3b379269e8/FLAGceb32de56 [2023-04-01 20:06:02,840 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/504f13574/28fb35e1f2694db89e318e3b379269e8 [2023-04-01 20:06:02,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:06:02,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:06:02,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:06:02,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:06:02,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:06:02,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:06:02" (1/1) ... [2023-04-01 20:06:02,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c83184e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:02, skipping insertion in model container [2023-04-01 20:06:02,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:06:02" (1/1) ... [2023-04-01 20:06:02,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:06:02,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:06:02,946 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/ss1.c[586,599] [2023-04-01 20:06:02,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:06:02,977 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:06:02,986 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/ss1.c[586,599] [2023-04-01 20:06:03,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:06:03,009 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:06:03,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03 WrapperNode [2023-04-01 20:06:03,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:06:03,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:06:03,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:06:03,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:06:03,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:06:03,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:06:03,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:06:03,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:06:03,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (1/1) ... [2023-04-01 20:06:03,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:06:03,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:03,066 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 20:06:03,083 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 20:06:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:06:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:06:03,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:06:03,094 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 20:06:03,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 20:06:03,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:06:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 20:06:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 20:06:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:06:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:06:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:06:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:06:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:06:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:06:03,160 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:06:03,161 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:06:03,355 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:06:03,358 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:06:03,359 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 20:06:03,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:06:03 BoogieIcfgContainer [2023-04-01 20:06:03,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:06:03,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:06:03,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:06:03,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:06:03,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:06:02" (1/3) ... [2023-04-01 20:06:03,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2933b11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:06:03, skipping insertion in model container [2023-04-01 20:06:03,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:06:03" (2/3) ... [2023-04-01 20:06:03,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2933b11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:06:03, skipping insertion in model container [2023-04-01 20:06:03,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:06:03" (3/3) ... [2023-04-01 20:06:03,365 INFO L112 eAbstractionObserver]: Analyzing ICFG ss1.c [2023-04-01 20:06:03,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:06:03,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:06:03,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:06:03,407 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;@669fc8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:06:03,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:06:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 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 20:06:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 20:06:03,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:03,416 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] [2023-04-01 20:06:03,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:03,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1106110167, now seen corresponding path program 1 times [2023-04-01 20:06:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:03,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177483457] [2023-04-01 20:06:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:03,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:06:03,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177483457] [2023-04-01 20:06:03,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 20:06:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648908651] [2023-04-01 20:06:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:03,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:03,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:03,542 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 20:06:03,542 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 20:06:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:06:03,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 20:06:03,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:06:03,629 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 20:06:03,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:06:03,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648908651] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:06:03,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:06:03,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 20:06:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637631050] [2023-04-01 20:06:03,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:06:03,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 20:06:03,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 20:06:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 20:06:03,653 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 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 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 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 20:06:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:06:03,667 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-04-01 20:06:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 20:06:03,668 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 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 25 [2023-04-01 20:06:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:06:03,672 INFO L225 Difference]: With dead ends: 64 [2023-04-01 20:06:03,672 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 20:06:03,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 20:06:03,684 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:06:03,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 20:06:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 20:06:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 20:06:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 20:06:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 20:06:03,707 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-04-01 20:06:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:06:03,707 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 20:06:03,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 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 20:06:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 20:06:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 20:06:03,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:03,708 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] [2023-04-01 20:06:03,716 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 20:06:03,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 20:06:03,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:03,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash 85041813, now seen corresponding path program 1 times [2023-04-01 20:06:03,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:03,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746909544] [2023-04-01 20:06:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:03,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:03,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:06:03,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875487501] [2023-04-01 20:06:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:03,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:03,956 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 20:06:03,957 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 20:06:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:06:04,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 20:06:04,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:06:04,095 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 20:06:04,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:06:04,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746909544] [2023-04-01 20:06:04,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:06:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875487501] [2023-04-01 20:06:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875487501] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:06:04,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:06:04,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:06:04,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289192928] [2023-04-01 20:06:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:06:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:06:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:06:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:06:04,097 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 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 20:06:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:06:04,139 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-04-01 20:06:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 20:06:04,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 20:06:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:06:04,140 INFO L225 Difference]: With dead ends: 53 [2023-04-01 20:06:04,140 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 20:06:04,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:06:04,141 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:06:04,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 20:06:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 20:06:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2023-04-01 20:06:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 20:06:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-04-01 20:06:04,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2023-04-01 20:06:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:06:04,147 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-04-01 20:06:04,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 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 20:06:04,147 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-04-01 20:06:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 20:06:04,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:04,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:06:04,163 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 20:06:04,353 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,SelfDestructingSolverStorable1 [2023-04-01 20:06:04,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:04,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1689002269, now seen corresponding path program 1 times [2023-04-01 20:06:04,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:04,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648362089] [2023-04-01 20:06:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:04,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:04,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:06:04,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813528263] [2023-04-01 20:06:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:04,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:04,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:04,412 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 20:06:04,414 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 20:06:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:06:04,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 20:06:04,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:06:04,570 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 20:06:04,579 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 20:06:04,621 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 20:06:04,786 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 20:06:04,888 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 20:06:04,979 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 20:06:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:06:05,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:06:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 20:06:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:06:05,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:05,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648362089] [2023-04-01 20:06:05,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:06:05,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813528263] [2023-04-01 20:06:05,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813528263] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:06:05,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:06:05,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2023-04-01 20:06:05,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196205614] [2023-04-01 20:06:05,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:06:05,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 20:06:05,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:05,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 20:06:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 20:06:05,731 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 36 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:06:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:06:06,739 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-04-01 20:06:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 20:06:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2023-04-01 20:06:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:06:06,741 INFO L225 Difference]: With dead ends: 65 [2023-04-01 20:06:06,741 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 20:06:06,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=1745, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 20:06:06,742 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:06:06,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 184 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:06:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 20:06:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2023-04-01 20:06:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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 20:06:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-04-01 20:06:06,749 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 33 [2023-04-01 20:06:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:06:06,750 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-04-01 20:06:06,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:06:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-04-01 20:06:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 20:06:06,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:06,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:06:06,770 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 20:06:06,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:06,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:06,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1297741857, now seen corresponding path program 2 times [2023-04-01 20:06:06,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:06,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606606236] [2023-04-01 20:06:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:06,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:06,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:06:06,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490976632] [2023-04-01 20:06:06,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:06:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:07,008 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 20:06:07,021 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 20:06:07,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:06:07,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:06:07,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:06:07,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:06:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 20:06:07,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:06:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 20:06:07,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:07,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606606236] [2023-04-01 20:06:07,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:06:07,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490976632] [2023-04-01 20:06:07,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490976632] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:06:07,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:06:07,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 20:06:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998570566] [2023-04-01 20:06:07,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:06:07,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 20:06:07,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 20:06:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:06:07,179 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 20:06:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:06:07,286 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2023-04-01 20:06:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 20:06:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 35 [2023-04-01 20:06:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:06:07,289 INFO L225 Difference]: With dead ends: 92 [2023-04-01 20:06:07,289 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 20:06:07,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:06:07,291 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:06:07,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 89 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:06:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 20:06:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2023-04-01 20:06:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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 20:06:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-04-01 20:06:07,307 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2023-04-01 20:06:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:06:07,307 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-04-01 20:06:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 20:06:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-04-01 20:06:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 20:06:07,309 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:07,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:06:07,329 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 20:06:07,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:07,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:07,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:07,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1959243551, now seen corresponding path program 3 times [2023-04-01 20:06:07,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:07,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629051546] [2023-04-01 20:06:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:07,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:07,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:06:07,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073996445] [2023-04-01 20:06:07,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 20:06:07,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:07,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:07,569 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 20:06:07,570 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 20:06:07,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 20:06:07,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:06:07,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:06:07,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:06:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 20:06:07,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:06:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 20:06:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629051546] [2023-04-01 20:06:07,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:06:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073996445] [2023-04-01 20:06:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073996445] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:06:07,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:06:07,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 20:06:07,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511905910] [2023-04-01 20:06:07,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:06:07,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 20:06:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 20:06:07,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:06:07,708 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 20:06:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:06:07,788 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-04-01 20:06:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:06:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 35 [2023-04-01 20:06:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:06:07,789 INFO L225 Difference]: With dead ends: 59 [2023-04-01 20:06:07,789 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 20:06:07,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:06:07,789 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:06:07,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 88 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 20:06:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 20:06:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-04-01 20:06:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 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 20:06:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-04-01 20:06:07,794 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2023-04-01 20:06:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:06:07,794 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-04-01 20:06:07,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 20:06:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-04-01 20:06:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 20:06:07,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:06:07,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:06:07,801 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 20:06:07,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:07,999 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:06:07,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:06:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 147208101, now seen corresponding path program 4 times [2023-04-01 20:06:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:06:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469854654] [2023-04-01 20:06:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:06:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:06:08,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 20:06:08,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824624922] [2023-04-01 20:06:08,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 20:06:08,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:06:08,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:06:08,020 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 20:06:08,055 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 20:06:08,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 20:06:08,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:06:08,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 74 conjunts are in the unsatisfiable core [2023-04-01 20:06:08,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:06:08,111 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 20:06:08,115 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 20:06:08,127 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 20:06:08,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 20:06:08,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:06:08,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:06:08,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:06:08,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:06:08,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:06:08,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 20:06:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:06:08,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:06:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:06:15,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:06:15,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469854654] [2023-04-01 20:06:15,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 20:06:15,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824624922] [2023-04-01 20:06:15,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824624922] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:06:15,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:06:15,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-04-01 20:06:15,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584161252] [2023-04-01 20:06:15,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:06:15,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-04-01 20:06:15,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:06:15,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-04-01 20:06:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 20:06:15,698 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 48 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 3 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 20:06:58,901 WARN L223 SmtUtils]: Spent 11.46s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:06:59,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-01 20:08:58,440 WARN L223 SmtUtils]: Spent 1.07m on a formula simplification that was a NOOP. DAG size: 239 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:10:00,572 WARN L223 SmtUtils]: Spent 23.15s on a formula simplification that was a NOOP. DAG size: 183 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:10:02,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-01 20:10:04,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-01 20:10:06,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-01 20:10:22,571 WARN L223 SmtUtils]: Spent 6.61s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:10:31,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1]