/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/reducercommutativity/sep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:49:18,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:49:18,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:49:18,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:49:18,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:49:18,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:49:18,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:49:18,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:49:18,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:49:18,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:49:18,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:49:18,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:49:18,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:49:18,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:49:18,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:49:18,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:49:18,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:49:18,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:49:18,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:49:18,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:49:18,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:49:18,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:49:18,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:49:18,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:49:18,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:49:18,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:49:18,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:49:18,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:49:18,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:49:18,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:49:18,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:49:18,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:49:18,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:49:18,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:49:18,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:49:18,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:49:18,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:49:18,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:49:18,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:49:18,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:49:18,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:49:18,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:49:18,968 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:49:18,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:49:18,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:49:18,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:49:18,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:49:18,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:49:18,970 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:49:18,970 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:49:18,970 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:49:18,970 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:49:18,970 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:49:18,971 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:49:18,971 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:49:18,971 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:49:18,971 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:49:18,971 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:49:18,971 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:49:18,971 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:49:18,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:49:18,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:49:18,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:49:18,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:49:18,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:49:18,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:49:18,973 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:49:18,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:49:18,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:49:18,973 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:49:18,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:49:18,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:49:18,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:49:18,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:49:19,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:49:19,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:49:19,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:49:19,205 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:49:19,205 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:49:19,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2023-04-01 08:49:20,323 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:49:20,467 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:49:20,467 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2023-04-01 08:49:20,472 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/626a6f970/7f6ac218954b4240b90b06cbd05f13e8/FLAG9ba52d813 [2023-04-01 08:49:20,486 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/626a6f970/7f6ac218954b4240b90b06cbd05f13e8 [2023-04-01 08:49:20,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:49:20,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:49:20,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:49:20,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:49:20,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:49:20,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f2090d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20, skipping insertion in model container [2023-04-01 08:49:20,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:49:20,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:49:20,639 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2023-04-01 08:49:20,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:49:20,649 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:49:20,664 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2023-04-01 08:49:20,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:49:20,675 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:49:20,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20 WrapperNode [2023-04-01 08:49:20,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:49:20,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:49:20,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:49:20,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:49:20,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,698 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:49:20,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:49:20,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:49:20,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:49:20,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (1/1) ... [2023-04-01 08:49:20,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:49:20,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:20,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:49:20,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:49:20,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:49:20,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:49:20,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:49:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-04-01 08:49:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:49:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:49:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:49:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:49:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:49:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:49:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:49:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:49:20,819 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:49:20,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:49:20,977 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:49:21,033 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:49:21,033 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 08:49:21,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:49:21 BoogieIcfgContainer [2023-04-01 08:49:21,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:49:21,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:49:21,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:49:21,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:49:21,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:49:20" (1/3) ... [2023-04-01 08:49:21,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd8dfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:49:21, skipping insertion in model container [2023-04-01 08:49:21,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:20" (2/3) ... [2023-04-01 08:49:21,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd8dfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:49:21, skipping insertion in model container [2023-04-01 08:49:21,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:49:21" (3/3) ... [2023-04-01 08:49:21,041 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2023-04-01 08:49:21,070 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:49:21,070 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:49:21,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:49:21,112 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12762496, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:49:21,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:49:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:49:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 08:49:21,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:21,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:21,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:21,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash -683664610, now seen corresponding path program 1 times [2023-04-01 08:49:21,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:21,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736207268] [2023-04-01 08:49:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 08:49:21,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736207268] [2023-04-01 08:49:21,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736207268] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181047918] [2023-04-01 08:49:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:21,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:21,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:49:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:21,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:49:21,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 08:49:21,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:49:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181047918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:49:21,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:49:21,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-04-01 08:49:21,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107826109] [2023-04-01 08:49:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:49:21,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:49:21,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:49:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 08:49:21,683 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:49:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:21,726 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2023-04-01 08:49:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:49:21,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-04-01 08:49:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:21,733 INFO L225 Difference]: With dead ends: 46 [2023-04-01 08:49:21,733 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 08:49:21,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 08:49:21,739 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:21,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 08:49:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 08:49:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-04-01 08:49:21,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 24 [2023-04-01 08:49:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:21,767 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-04-01 08:49:21,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:49:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-04-01 08:49:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 08:49:21,768 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:21,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:21,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:21,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 08:49:21,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:21,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1960015847, now seen corresponding path program 1 times [2023-04-01 08:49:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:21,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139838921] [2023-04-01 08:49:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:21,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:49:22,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:22,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139838921] [2023-04-01 08:49:22,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139838921] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:49:22,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:49:22,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:49:22,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168671335] [2023-04-01 08:49:22,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:49:22,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:49:22,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:22,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:49:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:49:22,087 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:49:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:22,110 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-04-01 08:49:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:49:22,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-04-01 08:49:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:22,112 INFO L225 Difference]: With dead ends: 30 [2023-04-01 08:49:22,112 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 08:49:22,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:49:22,114 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:22,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 08:49:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 08:49:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-01 08:49:22,125 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 27 [2023-04-01 08:49:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:22,126 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-01 08:49:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:49:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-01 08:49:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 08:49:22,127 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:22,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:22,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 08:49:22,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:22,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash -959484533, now seen corresponding path program 1 times [2023-04-01 08:49:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:22,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995471710] [2023-04-01 08:49:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 08:49:22,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:22,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995471710] [2023-04-01 08:49:22,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995471710] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:22,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408208043] [2023-04-01 08:49:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:22,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:22,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:22,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:22,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:49:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:22,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:49:22,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 08:49:22,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 08:49:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408208043] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:22,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401626302] [2023-04-01 08:49:22,546 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:22,546 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:22,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:22,555 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:22,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:22,738 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:49:24,064 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 57 for LOIs [2023-04-01 08:49:24,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:49:24,200 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:25,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '453#(and (= 101 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 4) 99) (= 112 (select (select |old(#memory_int)| 2) 2)) (= 115 (select (select |old(#memory_int)| 2) 0)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= 6 (select |old(#length)| 2)) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= ~N~0 1)) (= (select (select |old(#memory_int)| 2) 3) 46) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select (select |old(#memory_int)| 2) 5) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:25,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:25,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:25,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-04-01 08:49:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359940895] [2023-04-01 08:49:25,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:25,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 08:49:25,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 08:49:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:49:25,881 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 08:49:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:25,930 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2023-04-01 08:49:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:49:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2023-04-01 08:49:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:25,931 INFO L225 Difference]: With dead ends: 36 [2023-04-01 08:49:25,931 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 08:49:25,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:49:25,932 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:25,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 08:49:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 08:49:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-04-01 08:49:25,936 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 28 [2023-04-01 08:49:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:25,936 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-04-01 08:49:25,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 08:49:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-04-01 08:49:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 08:49:25,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:25,939 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:25,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:26,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 08:49:26,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:26,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash -431776682, now seen corresponding path program 2 times [2023-04-01 08:49:26,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:26,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592315442] [2023-04-01 08:49:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:49:31,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:31,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592315442] [2023-04-01 08:49:31,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592315442] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:31,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308849087] [2023-04-01 08:49:31,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:49:31,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:31,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:31,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:31,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:49:32,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 08:49:32,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:32,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 92 conjunts are in the unsatisfiable core [2023-04-01 08:49:32,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:32,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:49:32,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 71 [2023-04-01 08:49:33,811 INFO L321 Elim1Store]: treesize reduction 136, result has 38.5 percent of original size [2023-04-01 08:49:33,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 223 treesize of output 246 [2023-04-01 08:49:35,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:49:35,481 INFO L321 Elim1Store]: treesize reduction 108, result has 58.5 percent of original size [2023-04-01 08:49:35,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 218 treesize of output 324 [2023-04-01 08:50:08,956 WARN L223 SmtUtils]: Spent 15.78s on a formula simplification. DAG size of input: 176 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 08:50:09,762 INFO L321 Elim1Store]: treesize reduction 24, result has 78.8 percent of original size [2023-04-01 08:50:09,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 355 treesize of output 313 [2023-04-01 08:50:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:50:10,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:11,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308849087] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:11,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029812647] [2023-04-01 08:50:11,309 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:11,309 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:11,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:11,310 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:11,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:11,351 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:50:11,991 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 57 for LOIs [2023-04-01 08:50:12,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:50:12,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:15,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (= 101 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 4) 99) (= 112 (select (select |old(#memory_int)| 2) 2)) (= 115 (select (select |old(#memory_int)| 2) 0)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= 6 (select |old(#length)| 2)) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= ~N~0 1)) (= (select (select |old(#memory_int)| 2) 3) 46) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select (select |old(#memory_int)| 2) 5) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:15,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:15,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:50:15,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2023-04-01 08:50:15,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711641478] [2023-04-01 08:50:15,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:15,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-01 08:50:15,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-01 08:50:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3297, Unknown=1, NotChecked=0, Total=3540 [2023-04-01 08:50:15,128 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 43 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 08:50:17,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 08:50:19,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]