/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/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:31:07,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:31:07,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:31:07,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:31:07,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:31:07,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:31:07,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:31:07,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:31:07,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:31:07,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:31:07,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:31:07,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:31:07,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:31:07,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:31:07,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:31:07,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:31:07,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:31:07,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:31:07,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:31:07,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:31:07,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:31:07,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:31:07,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:31:07,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:31:07,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:31:07,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 22:31:07,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 22:31:07,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 22:31:07,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 22:31:07,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 22:31:07,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 22:31:07,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 22:31:07,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 22:31:07,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:31:07,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:31:07,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:31:07,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:31:08,005 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:31:08,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:31:08,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:31:08,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:31:08,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:31:08,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:31:08,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:31:08,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:31:08,008 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:31:08,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:31:08,009 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:31:08,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:31:08,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:31:08,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:31:08,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:31:08,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:31:08,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:31:08,010 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:31:08,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:31:08,011 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:31:08,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:31:08,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:31:08,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:31:08,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:31:08,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:31:08,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:31:08,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:31:08,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:31:08,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:31:08,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:31:08,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:31:08,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:31:08,013 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:31:08,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:31:08,013 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:31:08,013 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:31:08,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:31:08,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:31:08,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:31:08,259 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:31:08,260 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:31:08,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2f.c [2023-03-30 22:31:09,414 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:31:09,618 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:31:09,618 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c [2023-03-30 22:31:09,624 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/521977c3e/84d1ff8b9d1248fcae0a00e939d3e975/FLAGe7610455b [2023-03-30 22:31:09,641 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/521977c3e/84d1ff8b9d1248fcae0a00e939d3e975 [2023-03-30 22:31:09,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:31:09,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:31:09,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:31:09,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:31:09,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:31:09,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0b013a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09, skipping insertion in model container [2023-03-30 22:31:09,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:31:09,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:31:09,815 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/eqn2f.c[588,601] [2023-03-30 22:31:09,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:31:09,848 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:31:09,862 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/eqn2f.c[588,601] [2023-03-30 22:31:09,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:31:09,880 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:31:09,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09 WrapperNode [2023-03-30 22:31:09,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:31:09,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:31:09,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:31:09,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:31:09,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,917 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:31:09,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:31:09,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:31:09,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:31:09,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (1/1) ... [2023-03-30 22:31:09,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:31:09,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:09,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:31:09,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:31:09,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:31:09,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:31:09,995 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:31:09,995 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:31:09,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:31:09,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:31:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:31:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:31:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:31:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:31:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:31:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:31:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:31:10,086 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:31:10,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:31:10,289 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:31:10,294 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:31:10,294 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:31:10,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:31:10 BoogieIcfgContainer [2023-03-30 22:31:10,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:31:10,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:31:10,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:31:10,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:31:10,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:31:09" (1/3) ... [2023-03-30 22:31:10,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca448ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:31:10, skipping insertion in model container [2023-03-30 22:31:10,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:31:09" (2/3) ... [2023-03-30 22:31:10,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca448ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:31:10, skipping insertion in model container [2023-03-30 22:31:10,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:31:10" (3/3) ... [2023-03-30 22:31:10,304 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2023-03-30 22:31:10,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:31:10,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:31:10,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:31:10,368 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;@a600c17, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:31:10,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:31:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:31:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:31:10,380 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:10,380 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] [2023-03-30 22:31:10,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:10,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:10,387 INFO L85 PathProgramCache]: Analyzing trace with hash 199879945, now seen corresponding path program 1 times [2023-03-30 22:31:10,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:10,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179944464] [2023-03-30 22:31:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:10,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:10,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:10,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179944464] [2023-03-30 22:31:10,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-30 22:31:10,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129017242] [2023-03-30 22:31:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:10,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:10,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:10,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:31:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:10,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-30 22:31:10,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:10,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:31:10,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129017242] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:31:10,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:31:10,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-30 22:31:10,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810049010] [2023-03-30 22:31:10,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:31:10,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-30 22:31:10,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:10,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-30 22:31:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-30 22:31:10,731 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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) [2023-03-30 22:31:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:10,751 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-03-30 22:31:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-30 22:31:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 22 [2023-03-30 22:31:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:10,759 INFO L225 Difference]: With dead ends: 58 [2023-03-30 22:31:10,759 INFO L226 Difference]: Without dead ends: 29 [2023-03-30 22:31:10,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-30 22:31:10,764 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2023-03-30 22:31:10,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:31:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-30 22:31:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-30 22:31:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:31:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-03-30 22:31:10,794 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2023-03-30 22:31:10,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:10,794 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-03-30 22:31:10,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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) [2023-03-30 22:31:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-03-30 22:31:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:31:10,795 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:10,795 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] [2023-03-30 22:31:10,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:11,001 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 [2023-03-30 22:31:11,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:11,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:11,003 INFO L85 PathProgramCache]: Analyzing trace with hash -386926069, now seen corresponding path program 1 times [2023-03-30 22:31:11,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:11,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367407742] [2023-03-30 22:31:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:11,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:11,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:31:11,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224654647] [2023-03-30 22:31:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:11,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:11,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:11,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:11,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:31:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:11,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-30 22:31:11,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:11,246 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-03-30 22:31:11,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-03-30 22:31:11,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:31:11,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:31:11,387 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 16 treesize of output 5 [2023-03-30 22:31:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:11,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:31:11,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367407742] [2023-03-30 22:31:11,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:31:11,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224654647] [2023-03-30 22:31:11,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224654647] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:31:11,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:31:11,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-30 22:31:11,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329898385] [2023-03-30 22:31:11,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:31:11,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-30 22:31:11,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-30 22:31:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:31:11,496 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:31:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:11,623 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-03-30 22:31:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 22:31:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-03-30 22:31:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:11,626 INFO L225 Difference]: With dead ends: 47 [2023-03-30 22:31:11,626 INFO L226 Difference]: Without dead ends: 45 [2023-03-30 22:31:11,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:31:11,629 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:11,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 137 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:31:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-03-30 22:31:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-03-30 22:31:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:31:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-03-30 22:31:11,647 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2023-03-30 22:31:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:11,648 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-03-30 22:31:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:31:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-03-30 22:31:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-30 22:31:11,651 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:11,651 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] [2023-03-30 22:31:11,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:11,856 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 [2023-03-30 22:31:11,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:11,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1765590153, now seen corresponding path program 1 times [2023-03-30 22:31:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23981753] [2023-03-30 22:31:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:11,877 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:31:11,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967671038] [2023-03-30 22:31:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:11,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:11,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:11,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:11,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:31:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:11,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:31:11,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:11,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:31:11,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:11,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23981753] [2023-03-30 22:31:11,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:31:11,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967671038] [2023-03-30 22:31:11,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967671038] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:31:11,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:31:11,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:31:11,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399878723] [2023-03-30 22:31:11,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:31:11,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:31:11,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:31:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:31:11,980 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-03-30 22:31:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:12,047 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2023-03-30 22:31:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:31:12,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 24 [2023-03-30 22:31:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:12,049 INFO L225 Difference]: With dead ends: 71 [2023-03-30 22:31:12,049 INFO L226 Difference]: Without dead ends: 58 [2023-03-30 22:31:12,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:31:12,051 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:12,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 69 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:31:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-03-30 22:31:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2023-03-30 22:31:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:31:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-03-30 22:31:12,058 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2023-03-30 22:31:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:12,058 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-03-30 22:31:12,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-03-30 22:31:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-03-30 22:31:12,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-30 22:31:12,059 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:12,059 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] [2023-03-30 22:31:12,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:12,265 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 [2023-03-30 22:31:12,266 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:12,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1858974921, now seen corresponding path program 1 times [2023-03-30 22:31:12,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:12,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095230657] [2023-03-30 22:31:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:12,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:12,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:31:12,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328589290] [2023-03-30 22:31:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:12,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:12,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:31:12,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:31:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:12,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:31:12,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:12,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:12,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:12,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095230657] [2023-03-30 22:31:12,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:31:12,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328589290] [2023-03-30 22:31:12,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328589290] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:12,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:31:12,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-03-30 22:31:12,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269190309] [2023-03-30 22:31:12,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:12,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:31:12,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:31:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:31:12,425 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-03-30 22:31:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:12,515 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-03-30 22:31:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:31:12,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 24 [2023-03-30 22:31:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:12,517 INFO L225 Difference]: With dead ends: 66 [2023-03-30 22:31:12,517 INFO L226 Difference]: Without dead ends: 55 [2023-03-30 22:31:12,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:31:12,518 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:12,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 88 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:31:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-30 22:31:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2023-03-30 22:31:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:31:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-03-30 22:31:12,525 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2023-03-30 22:31:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:12,525 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-03-30 22:31:12,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-03-30 22:31:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-03-30 22:31:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-30 22:31:12,526 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:12,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:12,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:12,732 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 [2023-03-30 22:31:12,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:12,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:12,732 INFO L85 PathProgramCache]: Analyzing trace with hash -292108345, now seen corresponding path program 1 times [2023-03-30 22:31:12,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:12,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639406246] [2023-03-30 22:31:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:12,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:12,757 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:31:12,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639680575] [2023-03-30 22:31:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:12,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:12,764 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) [2023-03-30 22:31:12,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:31:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:12,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjunts are in the unsatisfiable core [2023-03-30 22:31:12,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:12,873 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 [2023-03-30 22:31:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:31:12,881 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 14 [2023-03-30 22:31:12,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:31:12,912 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 [2023-03-30 22:31:12,963 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 [2023-03-30 22:31:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:13,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:13,133 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_137 (Array Int Int))) (= 1 (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_137) c_main_~b~0.base) c_main_~b~0.offset))) is different from false [2023-03-30 22:31:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-03-30 22:31:13,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:13,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639406246] [2023-03-30 22:31:13,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:31:13,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639680575] [2023-03-30 22:31:13,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639680575] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:13,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:31:13,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-03-30 22:31:13,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936257313] [2023-03-30 22:31:13,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:13,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 22:31:13,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:13,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 22:31:13,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2023-03-30 22:31:13,165 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:31:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:13,471 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2023-03-30 22:31:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:31:13,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-03-30 22:31:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:13,473 INFO L225 Difference]: With dead ends: 72 [2023-03-30 22:31:13,473 INFO L226 Difference]: Without dead ends: 70 [2023-03-30 22:31:13,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=458, Unknown=1, NotChecked=44, Total=600 [2023-03-30 22:31:13,474 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 26 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:13,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 222 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 207 Invalid, 5 Unknown, 53 Unchecked, 0.2s Time] [2023-03-30 22:31:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-03-30 22:31:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2023-03-30 22:31:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:31:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-03-30 22:31:13,493 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 26 [2023-03-30 22:31:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:13,494 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-03-30 22:31:13,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:31:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-03-30 22:31:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:31:13,495 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:13,495 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, 1] [2023-03-30 22:31:13,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:13,702 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 [2023-03-30 22:31:13,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:13,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash -781361951, now seen corresponding path program 1 times [2023-03-30 22:31:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:13,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11304664] [2023-03-30 22:31:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:13,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:31:13,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449174439] [2023-03-30 22:31:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:13,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:13,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:13,750 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) [2023-03-30 22:31:13,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:31:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:31:13,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 22:31:13,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:13,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:31:13,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:13,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11304664] [2023-03-30 22:31:13,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:31:13,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449174439] [2023-03-30 22:31:13,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449174439] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:31:13,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:31:13,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:31:13,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648984377] [2023-03-30 22:31:13,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:31:13,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:31:13,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:13,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:31:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:31:13,865 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:31:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:13,934 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2023-03-30 22:31:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 22:31:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-03-30 22:31:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:13,935 INFO L225 Difference]: With dead ends: 69 [2023-03-30 22:31:13,935 INFO L226 Difference]: Without dead ends: 47 [2023-03-30 22:31:13,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:31:13,936 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:13,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:31:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-30 22:31:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-03-30 22:31:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:31:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-03-30 22:31:13,944 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 30 [2023-03-30 22:31:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:13,944 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-03-30 22:31:13,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:31:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-03-30 22:31:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:31:13,945 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:13,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:13,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:14,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:14,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:14,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:14,152 INFO L85 PathProgramCache]: Analyzing trace with hash 525498179, now seen corresponding path program 2 times [2023-03-30 22:31:14,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:14,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252626115] [2023-03-30 22:31:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:14,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:14,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:31:14,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778536894] [2023-03-30 22:31:14,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:31:14,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:14,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:14,199 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) [2023-03-30 22:31:14,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:31:14,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:31:14,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:31:14,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:31:14,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:31:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:14,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:31:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:31:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:31:14,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252626115] [2023-03-30 22:31:14,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:31:14,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778536894] [2023-03-30 22:31:14,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778536894] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:31:14,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:31:14,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-03-30 22:31:14,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190785370] [2023-03-30 22:31:14,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:31:14,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 22:31:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:31:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 22:31:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-03-30 22:31:14,426 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2023-03-30 22:31:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:31:14,679 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2023-03-30 22:31:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 22:31:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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 30 [2023-03-30 22:31:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:31:14,681 INFO L225 Difference]: With dead ends: 126 [2023-03-30 22:31:14,681 INFO L226 Difference]: Without dead ends: 99 [2023-03-30 22:31:14,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2023-03-30 22:31:14,683 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:31:14,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 149 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:31:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-03-30 22:31:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2023-03-30 22:31:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 57 states have internal predecessors, (64), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:31:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-03-30 22:31:14,715 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 30 [2023-03-30 22:31:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:31:14,715 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-03-30 22:31:14,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2023-03-30 22:31:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-03-30 22:31:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-30 22:31:14,720 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:31:14,720 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, 1, 1, 1, 1, 1] [2023-03-30 22:31:14,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:14,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:14,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:31:14,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:31:14,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2143768931, now seen corresponding path program 1 times [2023-03-30 22:31:14,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:31:14,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73454000] [2023-03-30 22:31:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:14,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:31:14,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:31:14,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618748334] [2023-03-30 22:31:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:31:14,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:31:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:31:14,943 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) [2023-03-30 22:31:14,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:31:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-30 22:31:15,036 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-30 22:31:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-30 22:31:15,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-03-30 22:31:15,070 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-30 22:31:15,071 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-30 22:31:15,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:31:15,273 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,SelfDestructingSolverStorable7 [2023-03-30 22:31:15,276 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-03-30 22:31:15,279 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-30 22:31:15,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.03 10:31:15 BoogieIcfgContainer [2023-03-30 22:31:15,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-30 22:31:15,301 INFO L158 Benchmark]: Toolchain (without parser) took 5655.98ms. Allocated memory is still 289.4MB. Free memory was 244.4MB in the beginning and 204.2MB in the end (delta: 40.2MB). Peak memory consumption was 41.8MB. Max. memory is 8.0GB. [2023-03-30 22:31:15,301 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 217.1MB. Free memory is still 170.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-30 22:31:15,301 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.97ms. Allocated memory is still 289.4MB. Free memory was 244.4MB in the beginning and 233.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-03-30 22:31:15,301 INFO L158 Benchmark]: Boogie Preprocessor took 38.43ms. Allocated memory is still 289.4MB. Free memory was 233.4MB in the beginning and 231.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-03-30 22:31:15,302 INFO L158 Benchmark]: RCFGBuilder took 376.21ms. Allocated memory is still 289.4MB. Free memory was 231.9MB in the beginning and 218.7MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-03-30 22:31:15,302 INFO L158 Benchmark]: TraceAbstraction took 5002.17ms. Allocated memory is still 289.4MB. Free memory was 218.2MB in the beginning and 204.2MB in the end (delta: 14.0MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. [2023-03-30 22:31:15,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 217.1MB. Free memory is still 170.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 232.97ms. Allocated memory is still 289.4MB. Free memory was 244.4MB in the beginning and 233.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.43ms. Allocated memory is still 289.4MB. Free memory was 233.4MB in the beginning and 231.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 376.21ms. Allocated memory is still 289.4MB. Free memory was 231.9MB in the beginning and 218.7MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 5002.17ms. Allocated memory is still 289.4MB. Free memory was 218.2MB in the beginning and 204.2MB in the end (delta: 14.0MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0, \old(N)=11] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [N=2, \old(N)=0] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=2, \old(N)=0, \old(cond)=1] [L13] COND FALSE !(!cond) VAL [N=2, \old(N)=0, \old(cond)=1, cond=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=2, \old(N)=0] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [N=2, \old(N)=0, a={-2:0}, b={-1:0}, i=1] [L34] COND TRUE i