/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 01:25:16,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 01:25:16,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 01:25:16,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 01:25:16,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 01:25:16,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 01:25:16,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 01:25:16,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 01:25:16,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 01:25:16,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 01:25:16,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 01:25:16,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 01:25:16,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 01:25:16,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 01:25:16,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 01:25:16,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 01:25:16,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 01:25:16,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 01:25:16,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 01:25:16,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 01:25:16,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 01:25:16,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 01:25:16,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 01:25:16,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 01:25:16,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 01:25:16,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 01:25:16,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 01:25:16,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 01:25:16,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 01:25:16,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 01:25:16,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 01:25:16,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 01:25:16,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 01:25:16,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 01:25:16,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 01:25:16,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 01:25:16,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 01:25:16,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 01:25:16,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 01:25:17,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 01:25:17,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 01:25:17,002 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 [2022-01-31 01:25:17,020 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 01:25:17,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 01:25:17,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 01:25:17,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 01:25:17,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 01:25:17,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 01:25:17,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 01:25:17,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 01:25:17,022 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 01:25:17,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 01:25:17,022 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 01:25:17,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 01:25:17,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 01:25:17,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 01:25:17,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 01:25:17,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 01:25:17,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 01:25:17,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 01:25:17,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 01:25:17,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 01:25:17,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 01:25:17,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 01:25:17,024 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 01:25:17,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 01:25:17,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 01:25:17,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 01:25:17,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 01:25:17,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 01:25:17,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 01:25:17,213 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 01:25:17,214 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 01:25:17,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2.c [2022-01-31 01:25:17,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cccad222/d6cd980468864ec89624240e761370ef/FLAG5541db8b5 [2022-01-31 01:25:17,622 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 01:25:17,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2.c [2022-01-31 01:25:17,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cccad222/d6cd980468864ec89624240e761370ef/FLAG5541db8b5 [2022-01-31 01:25:17,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cccad222/d6cd980468864ec89624240e761370ef [2022-01-31 01:25:17,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 01:25:17,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 01:25:17,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 01:25:17,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 01:25:17,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 01:25:17,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16b21e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17, skipping insertion in model container [2022-01-31 01:25:17,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 01:25:17,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 01:25:17,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2.c[587,600] [2022-01-31 01:25:17,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 01:25:17,835 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 01:25:17,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2.c[587,600] [2022-01-31 01:25:17,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 01:25:17,864 INFO L208 MainTranslator]: Completed translation [2022-01-31 01:25:17,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17 WrapperNode [2022-01-31 01:25:17,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 01:25:17,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 01:25:17,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 01:25:17,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 01:25:17,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 01:25:17,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 01:25:17,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 01:25:17,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 01:25:17,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (1/1) ... [2022-01-31 01:25:17,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 01:25:17,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:25:17,931 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) [2022-01-31 01:25:17,947 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 [2022-01-31 01:25:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 01:25:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 01:25:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 01:25:17,977 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 01:25:17,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 01:25:17,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 01:25:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 01:25:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 01:25:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 01:25:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 01:25:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 01:25:18,069 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 01:25:18,070 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 01:25:18,279 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 01:25:18,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 01:25:18,283 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-31 01:25:18,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:25:18 BoogieIcfgContainer [2022-01-31 01:25:18,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 01:25:18,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 01:25:18,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 01:25:18,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 01:25:18,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:25:17" (1/3) ... [2022-01-31 01:25:18,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f230df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:25:18, skipping insertion in model container [2022-01-31 01:25:18,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:17" (2/3) ... [2022-01-31 01:25:18,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f230df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:25:18, skipping insertion in model container [2022-01-31 01:25:18,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:25:18" (3/3) ... [2022-01-31 01:25:18,293 INFO L111 eAbstractionObserver]: Analyzing ICFG res2.c [2022-01-31 01:25:18,296 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 01:25:18,297 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 01:25:18,334 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 01:25:18,340 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 01:25:18,340 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 01:25:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 01:25:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 01:25:18,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:25:18,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:25:18,359 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:25:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:25:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1259377407, now seen corresponding path program 1 times [2022-01-31 01:25:18,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:25:18,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26727446] [2022-01-31 01:25:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:25:18,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:25:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:25:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:18,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:25:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:25:18,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:25:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26727446] [2022-01-31 01:25:18,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26727446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:25:18,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:25:18,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 01:25:18,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485722825] [2022-01-31 01:25:18,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:25:18,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 01:25:18,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:25:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 01:25:18,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 01:25:18,577 INFO L87 Difference]: Start difference. First operand has 43 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:25:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:25:18,642 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-01-31 01:25:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 01:25:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-01-31 01:25:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:25:18,648 INFO L225 Difference]: With dead ends: 76 [2022-01-31 01:25:18,648 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 01:25:18,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 01:25:18,652 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 01:25:18,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 01:25:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 01:25:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 01:25:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:25:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-31 01:25:18,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2022-01-31 01:25:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:25:18,679 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-31 01:25:18,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:25:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-31 01:25:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 01:25:18,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:25:18,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:25:18,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 01:25:18,682 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:25:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:25:18,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1596973367, now seen corresponding path program 1 times [2022-01-31 01:25:18,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:25:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643252446] [2022-01-31 01:25:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:25:18,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:25:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:18,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:25:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:25:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:25:18,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:25:18,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643252446] [2022-01-31 01:25:18,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643252446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:25:18,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:25:18,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 01:25:18,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962514962] [2022-01-31 01:25:18,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:25:18,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 01:25:18,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:25:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 01:25:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 01:25:18,800 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:25:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:25:18,909 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-01-31 01:25:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 01:25:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-01-31 01:25:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:25:18,910 INFO L225 Difference]: With dead ends: 69 [2022-01-31 01:25:18,910 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 01:25:18,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 01:25:18,912 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:25:18,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:25:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 01:25:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-01-31 01:25:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:25:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-01-31 01:25:18,917 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2022-01-31 01:25:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:25:18,917 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-01-31 01:25:18,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:25:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-01-31 01:25:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 01:25:18,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:25:18,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:25:18,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 01:25:18,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:25:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:25:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 378806037, now seen corresponding path program 1 times [2022-01-31 01:25:18,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:25:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060766] [2022-01-31 01:25:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:25:18,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:25:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:19,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:25:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:19,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:25:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:25:19,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:25:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060766] [2022-01-31 01:25:19,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 01:25:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643199840] [2022-01-31 01:25:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:25:19,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:25:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:25:19,703 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) [2022-01-31 01:25:19,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 01:25:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:19,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-31 01:25:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:25:19,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 01:25:19,908 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 01:25:19,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-01-31 01:25:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:25:19,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-01-31 01:25:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:25:20,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-01-31 01:25:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:25:20,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-31 01:25:20,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:25:20,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-01-31 01:25:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:25:20,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 40 [2022-01-31 01:25:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:25:21,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2022-01-31 01:25:22,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:25:22,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-01-31 01:25:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:25:22,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:25:55,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:25:55,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:25:55,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:25:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:25:55,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643199840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:25:55,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 01:25:55,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 46 [2022-01-31 01:25:55,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555599435] [2022-01-31 01:25:55,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 01:25:55,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 01:25:55,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:25:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 01:25:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1770, Unknown=12, NotChecked=0, Total=2070 [2022-01-31 01:25:55,541 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 01:25:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:25:57,545 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2022-01-31 01:25:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 01:25:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-01-31 01:25:57,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:25:57,549 INFO L225 Difference]: With dead ends: 105 [2022-01-31 01:25:57,550 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 01:25:57,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=492, Invalid=3278, Unknown=12, NotChecked=0, Total=3782 [2022-01-31 01:25:57,555 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 01:25:57,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 218 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 203 Invalid, 0 Unknown, 276 Unchecked, 0.2s Time] [2022-01-31 01:25:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 01:25:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2022-01-31 01:25:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:25:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2022-01-31 01:25:57,568 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 41 [2022-01-31 01:25:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:25:57,568 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2022-01-31 01:25:57,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 01:25:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2022-01-31 01:25:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 01:25:57,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:25:57,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:25:57,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 01:25:57,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:25:57,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:25:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:25:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1970902185, now seen corresponding path program 2 times [2022-01-31 01:25:57,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:25:57,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964121880] [2022-01-31 01:25:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:25:57,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:25:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:57,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:25:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:57,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:25:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 01:25:57,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:25:57,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964121880] [2022-01-31 01:25:57,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964121880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 01:25:57,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255394041] [2022-01-31 01:25:57,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 01:25:57,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:25:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:25:57,868 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) [2022-01-31 01:25:57,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 01:25:57,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 01:25:57,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:25:57,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 01:25:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:25:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 01:25:58,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:25:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 01:25:58,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255394041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:25:58,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 01:25:58,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 01:25:58,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045888136] [2022-01-31 01:25:58,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 01:25:58,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 01:25:58,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:25:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 01:25:58,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 01:25:58,180 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:25:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:25:58,471 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2022-01-31 01:25:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 01:25:58,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-01-31 01:25:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:25:58,473 INFO L225 Difference]: With dead ends: 151 [2022-01-31 01:25:58,473 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 01:25:58,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-31 01:25:58,474 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 01:25:58,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 57 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 01:25:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 01:25:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2022-01-31 01:25:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:25:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-01-31 01:25:58,481 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 43 [2022-01-31 01:25:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:25:58,481 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-01-31 01:25:58,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:25:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-01-31 01:25:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 01:25:58,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:25:58,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:25:58,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 01:25:58,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 01:25:58,692 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:25:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:25:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1791240999, now seen corresponding path program 3 times [2022-01-31 01:25:58,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:25:58,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127191455] [2022-01-31 01:25:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:25:58,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:25:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:25:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:58,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:25:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:25:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 01:25:58,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:25:58,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127191455] [2022-01-31 01:25:58,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127191455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 01:25:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472051593] [2022-01-31 01:25:58,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 01:25:58,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:25:58,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:25:58,805 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) [2022-01-31 01:25:58,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 01:25:58,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 01:25:58,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:25:58,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 01:25:58,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:25:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 01:25:59,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:25:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 01:25:59,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472051593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:25:59,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 01:25:59,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 01:25:59,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855115815] [2022-01-31 01:25:59,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 01:25:59,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 01:25:59,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:25:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 01:25:59,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 01:25:59,104 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:25:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:25:59,362 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-01-31 01:25:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 01:25:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-01-31 01:25:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:25:59,363 INFO L225 Difference]: With dead ends: 77 [2022-01-31 01:25:59,363 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 01:25:59,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-31 01:25:59,364 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 01:25:59,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 57 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 01:25:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 01:25:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-01-31 01:25:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:25:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-01-31 01:25:59,376 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 45 [2022-01-31 01:25:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:25:59,376 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-01-31 01:25:59,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:25:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-01-31 01:25:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 01:25:59,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:25:59,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:25:59,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 01:25:59,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:25:59,581 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:25:59,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:25:59,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1298349409, now seen corresponding path program 4 times [2022-01-31 01:25:59,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:25:59,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337007486] [2022-01-31 01:25:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:25:59,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:25:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:26:01,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:26:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:26:01,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:26:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:26:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:26:01,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:26:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337007486] [2022-01-31 01:26:01,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337007486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 01:26:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585486787] [2022-01-31 01:26:01,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 01:26:01,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:26:01,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:26:01,518 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) [2022-01-31 01:26:01,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 01:26:01,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 01:26:01,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:26:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 78 conjunts are in the unsatisfiable core [2022-01-31 01:26:01,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:26:01,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 01:26:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:01,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 01:26:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:01,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-01-31 01:26:02,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:02,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:02,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-01-31 01:26:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:02,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-01-31 01:26:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:02,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:02,697 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-01-31 01:26:02,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2022-01-31 01:26:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:03,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:03,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:03,099 INFO L353 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-01-31 01:26:03,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 67 [2022-01-31 01:26:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:03,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:03,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:03,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:03,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:03,697 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-31 01:26:03,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2022-01-31 01:26:03,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:03,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-01-31 01:26:04,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:04,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:04,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:04,190 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-01-31 01:26:04,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2022-01-31 01:26:04,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:04,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:04,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:04,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:04,522 INFO L353 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-01-31 01:26:04,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 68 [2022-01-31 01:26:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:05,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:05,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:26:05,058 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-31 01:26:05,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 74 [2022-01-31 01:26:05,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:05,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-01-31 01:26:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:26:05,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-01-31 01:26:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:26:05,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:30:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:30:59,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585486787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:30:59,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 01:30:59,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29, 29] total 86 [2022-01-31 01:30:59,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826850224] [2022-01-31 01:30:59,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 01:30:59,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 01:30:59,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:30:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 01:30:59,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=6563, Unknown=113, NotChecked=0, Total=7310 [2022-01-31 01:30:59,806 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 86 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 83 states have internal predecessors, (121), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:31:51,538 WARN L228 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 131 DAG size of output: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:35:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:35:08,179 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2022-01-31 01:35:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 01:35:08,179 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 83 states have internal predecessors, (121), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2022-01-31 01:35:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:35:08,180 INFO L225 Difference]: With dead ends: 130 [2022-01-31 01:35:08,180 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 01:35:08,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4963 ImplicationChecksByTransitivity, 514.0s TimeCoverageRelationStatistics Valid=1216, Invalid=12867, Unknown=197, NotChecked=0, Total=14280 [2022-01-31 01:35:08,183 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 986 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 01:35:08,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 338 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 482 Invalid, 0 Unknown, 986 Unchecked, 0.4s Time] [2022-01-31 01:35:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 01:35:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-01-31 01:35:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 106 states have (on average 1.169811320754717) internal successors, (124), 106 states have internal predecessors, (124), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:35:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2022-01-31 01:35:08,207 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 53 [2022-01-31 01:35:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:35:08,208 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2022-01-31 01:35:08,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 83 states have internal predecessors, (121), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:35:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2022-01-31 01:35:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 01:35:08,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:35:08,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:35:08,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 01:35:08,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:35:08,427 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:35:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:35:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1241982627, now seen corresponding path program 5 times [2022-01-31 01:35:08,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:35:08,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535235453] [2022-01-31 01:35:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:35:08,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:35:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:08,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:35:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:08,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:35:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 01:35:08,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:35:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535235453] [2022-01-31 01:35:08,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535235453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 01:35:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117185554] [2022-01-31 01:35:08,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 01:35:08,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:35:08,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:35:08,558 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) [2022-01-31 01:35:08,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 01:35:08,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 01:35:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:35:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 01:35:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:35:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 01:35:08,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:35:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 01:35:09,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117185554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:35:09,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 01:35:09,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 01:35:09,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372086273] [2022-01-31 01:35:09,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 01:35:09,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 01:35:09,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:35:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 01:35:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 01:35:09,016 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:35:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:35:09,372 INFO L93 Difference]: Finished difference Result 215 states and 247 transitions. [2022-01-31 01:35:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 01:35:09,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-01-31 01:35:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:35:09,374 INFO L225 Difference]: With dead ends: 215 [2022-01-31 01:35:09,374 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 01:35:09,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-31 01:35:09,375 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 127 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 01:35:09,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 52 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 01:35:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 01:35:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2022-01-31 01:35:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 89 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:35:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-01-31 01:35:09,389 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 55 [2022-01-31 01:35:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:35:09,389 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-01-31 01:35:09,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:35:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-01-31 01:35:09,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 01:35:09,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:35:09,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:35:09,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 01:35:09,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:35:09,590 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:35:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:35:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash -832996059, now seen corresponding path program 6 times [2022-01-31 01:35:09,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:35:09,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562031243] [2022-01-31 01:35:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:35:09,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:35:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:09,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:35:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:35:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 01:35:09,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:35:09,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562031243] [2022-01-31 01:35:09,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562031243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 01:35:09,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88301118] [2022-01-31 01:35:09,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 01:35:09,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:35:09,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:35:09,694 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) [2022-01-31 01:35:09,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 01:35:09,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 01:35:09,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:35:09,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 01:35:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:35:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 01:35:09,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:35:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 01:35:10,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88301118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:35:10,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 01:35:10,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 01:35:10,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143763878] [2022-01-31 01:35:10,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 01:35:10,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 01:35:10,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:35:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 01:35:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 01:35:10,088 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 14 states have internal predecessors, (76), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:35:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:35:10,416 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2022-01-31 01:35:10,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 01:35:10,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 14 states have internal predecessors, (76), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-01-31 01:35:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:35:10,417 INFO L225 Difference]: With dead ends: 109 [2022-01-31 01:35:10,417 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 01:35:10,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 01:35:10,418 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 67 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 01:35:10,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 88 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 01:35:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 01:35:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2022-01-31 01:35:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 59 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:35:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-01-31 01:35:10,423 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 57 [2022-01-31 01:35:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:35:10,424 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-01-31 01:35:10,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 14 states have internal predecessors, (76), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:35:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-01-31 01:35:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 01:35:10,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:35:10,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:35:10,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 01:35:10,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:35:10,640 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:35:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:35:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash -287540819, now seen corresponding path program 7 times [2022-01-31 01:35:10,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:35:10,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987500333] [2022-01-31 01:35:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:35:10,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:35:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:35:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:13,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:35:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:35:13,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:35:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987500333] [2022-01-31 01:35:13,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987500333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 01:35:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656676680] [2022-01-31 01:35:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 01:35:13,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:35:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:35:13,484 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) [2022-01-31 01:35:13,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 01:35:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:35:13,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 118 conjunts are in the unsatisfiable core [2022-01-31 01:35:13,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:35:13,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 01:35:13,618 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 01:35:13,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-01-31 01:35:13,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:13,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 01:35:13,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:13,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-01-31 01:35:14,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-01-31 01:35:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:35:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 54 [2022-01-31 01:35:14,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:14,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:35:14,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2022-01-31 01:35:15,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:15,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2022-01-31 01:35:15,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:15,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-01-31 01:35:15,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:15,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-01-31 01:35:16,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 75 [2022-01-31 01:35:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:35:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2022-01-31 01:35:16,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:35:16,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:16,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 91 [2022-01-31 01:35:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:17,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-01-31 01:35:17,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:17,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-01-31 01:35:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:18,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:18,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2022-01-31 01:35:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:18,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:18,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 108 [2022-01-31 01:35:19,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:35:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:19,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 12 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 120 [2022-01-31 01:35:19,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:35:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:19,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 12 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 124 [2022-01-31 01:35:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:20,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 114 [2022-01-31 01:35:21,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:35:21,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 43 [2022-01-31 01:35:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:35:21,995 INFO L328 TraceCheckSpWp]: Computing backward predicates...