/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/loop-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:07:42,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:07:42,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:07:42,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:07:42,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:07:42,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:07:42,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:07:42,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:07:42,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:07:42,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:07:42,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:07:42,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:07:42,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:07:42,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:07:42,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:07:42,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:07:42,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:07:42,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:07:42,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:07:42,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:07:42,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:07:42,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:07:42,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:07:42,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:07:42,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:07:42,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:07:42,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:07:42,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:07:42,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:07:42,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:07:42,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:07:42,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:07:42,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:07:42,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:07:42,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:07:42,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:07:42,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:07:42,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:07:42,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:07:42,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:07:42,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:07:42,594 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 11:07:42,624 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:07:42,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:07:42,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:07:42,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:07:42,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:07:42,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:07:42,626 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:07:42,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:07:42,626 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:07:42,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:07:42,626 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:07:42,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:07:42,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:07:42,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:07:42,627 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:07:42,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:07:42,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:07:42,628 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:07:42,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:07:42,628 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:07:42,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:07:42,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:07:42,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:07:42,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:07:42,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:07:42,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:07:42,629 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:07:42,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:07:42,629 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:07:42,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:07:42,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:07:42,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:07:42,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:07:42,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:07:42,630 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:07:42,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:07:42,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:07:42,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:07:42,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:07:42,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:07:42,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:07:42,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:07:42,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:07:42,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:07:42,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:07:42,851 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:07:42,852 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:07:42,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/mod3.c [2023-04-01 11:07:43,994 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:07:44,180 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:07:44,181 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/mod3.c [2023-04-01 11:07:44,187 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96eb48ac/bd68289e2e164f4e994e206aa597b4e5/FLAG04c5248bc [2023-04-01 11:07:44,203 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96eb48ac/bd68289e2e164f4e994e206aa597b4e5 [2023-04-01 11:07:44,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:07:44,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:07:44,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:07:44,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:07:44,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:07:44,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f760ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44, skipping insertion in model container [2023-04-01 11:07:44,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:07:44,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:07:44,341 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/loop-industry-pattern/mod3.c[394,407] [2023-04-01 11:07:44,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:07:44,360 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:07:44,370 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/loop-industry-pattern/mod3.c[394,407] [2023-04-01 11:07:44,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:07:44,393 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:07:44,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44 WrapperNode [2023-04-01 11:07:44,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:07:44,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:07:44,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:07:44,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:07:44,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,437 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:07:44,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:07:44,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:07:44,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:07:44,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (1/1) ... [2023-04-01 11:07:44,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:07:44,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:07:44,474 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 11:07:44,500 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 11:07:44,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:07:44,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:07:44,514 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:07:44,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:07:44,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:07:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:07:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:07:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:07:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:07:44,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:07:44,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:07:44,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:07:44,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:07:44,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:07:44,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:07:44,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:07:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:07:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:07:44,580 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:07:44,583 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:07:44,743 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:07:44,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:07:44,845 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:07:44,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:07:44 BoogieIcfgContainer [2023-04-01 11:07:44,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:07:44,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:07:44,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:07:44,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:07:44,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:07:44" (1/3) ... [2023-04-01 11:07:44,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64980c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:07:44, skipping insertion in model container [2023-04-01 11:07:44,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:07:44" (2/3) ... [2023-04-01 11:07:44,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64980c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:07:44, skipping insertion in model container [2023-04-01 11:07:44,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:07:44" (3/3) ... [2023-04-01 11:07:44,870 INFO L112 eAbstractionObserver]: Analyzing ICFG mod3.c [2023-04-01 11:07:44,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:07:44,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:07:44,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:07:44,970 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;@711f7d5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:07:44,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:07:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:07:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:07:45,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:07:45,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:07:45,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:07:45,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:07:45,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2125847125, now seen corresponding path program 1 times [2023-04-01 11:07:45,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:07:45,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602589765] [2023-04-01 11:07:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:07:45,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:07:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:07:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:07:45,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:07:45,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602589765] [2023-04-01 11:07:45,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602589765] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:07:45,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:07:45,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:07:45,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178132308] [2023-04-01 11:07:45,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:07:45,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:07:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:07:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:07:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:07:45,235 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:07:45,277 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 11:07:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:07:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 11:07:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:07:45,288 INFO L225 Difference]: With dead ends: 31 [2023-04-01 11:07:45,288 INFO L226 Difference]: Without dead ends: 13 [2023-04-01 11:07:45,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:07:45,296 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:07:45,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:07:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-01 11:07:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-01 11:07:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-04-01 11:07:45,329 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2023-04-01 11:07:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:07:45,330 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-04-01 11:07:45,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-04-01 11:07:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 11:07:45,333 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:07:45,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:07:45,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:07:45,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:07:45,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:07:45,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1830987452, now seen corresponding path program 1 times [2023-04-01 11:07:45,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:07:45,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044056362] [2023-04-01 11:07:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:07:45,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:07:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:07:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:07:45,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:07:45,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044056362] [2023-04-01 11:07:45,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044056362] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:07:45,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:07:45,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:07:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098741397] [2023-04-01 11:07:45,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:07:45,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:07:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:07:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:07:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:07:45,509 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:07:45,527 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2023-04-01 11:07:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:07:45,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 11:07:45,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:07:45,529 INFO L225 Difference]: With dead ends: 21 [2023-04-01 11:07:45,529 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 11:07:45,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:07:45,537 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:07:45,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:07:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 11:07:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-01 11:07:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-01 11:07:45,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2023-04-01 11:07:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:07:45,545 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-01 11:07:45,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-01 11:07:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:07:45,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:07:45,546 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:07:45,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:07:45,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:07:45,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:07:45,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1969614820, now seen corresponding path program 1 times [2023-04-01 11:07:45,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:07:45,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858399804] [2023-04-01 11:07:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:07:45,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:07:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:07:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:07:46,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:07:46,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858399804] [2023-04-01 11:07:46,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858399804] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:07:46,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912787039] [2023-04-01 11:07:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:07:46,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:07:46,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:07:46,098 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 11:07:46,100 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 11:07:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:07:46,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 11:07:46,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:07:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:07:47,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:07:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:07:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912787039] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:07:47,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:07:47,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2023-04-01 11:07:47,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865011553] [2023-04-01 11:07:47,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:07:47,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:07:47,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:07:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:07:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:07:47,919 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:07:48,504 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-04-01 11:07:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:07:48,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 11:07:48,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:07:48,505 INFO L225 Difference]: With dead ends: 15 [2023-04-01 11:07:48,505 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 11:07:48,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:07:48,506 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:07:48,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 11:07:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 11:07:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 11:07:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 11:07:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 11:07:48,508 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2023-04-01 11:07:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:07:48,508 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 11:07:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 11:07:48,509 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 11:07:48,511 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 11:07:48,520 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 11:07:48,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:07:48,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 11:07:48,740 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2023-04-01 11:07:48,741 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 3) no Hoare annotation was computed. [2023-04-01 11:07:48,741 INFO L895 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (+ (* 4294967296 .cse0) (* (div (+ (* (- 4294967296) .cse0) main_~x~0) 3) 3)))) [2023-04-01 11:07:48,741 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 14 35) no Hoare annotation was computed. [2023-04-01 11:07:48,741 INFO L895 garLoopResultBuilder]: At program point L25-2(lines 18 31) the Hoare annotation is: (or (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (+ (* 4294967296 .cse0) (* (div (+ (* (- 4294967296) .cse0) main_~x~0) 3) 3)))) (< 0 (mod main_~y~0 4294967296))) [2023-04-01 11:07:48,741 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 35) the Hoare annotation is: true [2023-04-01 11:07:48,742 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 33) no Hoare annotation was computed. [2023-04-01 11:07:48,742 INFO L899 garLoopResultBuilder]: For program point L18-1(lines 18 31) no Hoare annotation was computed. [2023-04-01 11:07:48,742 INFO L899 garLoopResultBuilder]: For program point L18-3(lines 14 35) no Hoare annotation was computed. [2023-04-01 11:07:48,742 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 11:07:48,742 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-01 11:07:48,742 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-01 11:07:48,742 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-01 11:07:48,742 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-01 11:07:48,742 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 11:07:48,743 INFO L899 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2023-04-01 11:07:48,743 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 8 12) no Hoare annotation was computed. [2023-04-01 11:07:48,743 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 8 12) the Hoare annotation is: true [2023-04-01 11:07:48,743 INFO L899 garLoopResultBuilder]: For program point L9(lines 9 10) no Hoare annotation was computed. [2023-04-01 11:07:48,743 INFO L899 garLoopResultBuilder]: For program point L9-2(lines 8 12) no Hoare annotation was computed. [2023-04-01 11:07:48,743 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2023-04-01 11:07:48,750 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-01 11:07:48,752 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 11:07:48,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 11:07:48 BoogieIcfgContainer [2023-04-01 11:07:48,767 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 11:07:48,767 INFO L158 Benchmark]: Toolchain (without parser) took 4559.63ms. Allocated memory is still 333.4MB. Free memory was 274.7MB in the beginning and 111.9MB in the end (delta: 162.8MB). Peak memory consumption was 164.4MB. Max. memory is 8.0GB. [2023-04-01 11:07:48,767 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 183.5MB. Free memory is still 132.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 11:07:48,768 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.38ms. Allocated memory is still 333.4MB. Free memory was 274.4MB in the beginning and 264.4MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-01 11:07:48,768 INFO L158 Benchmark]: Boogie Preprocessor took 44.78ms. Allocated memory is still 333.4MB. Free memory was 264.4MB in the beginning and 262.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 11:07:48,768 INFO L158 Benchmark]: RCFGBuilder took 407.52ms. Allocated memory is still 333.4MB. Free memory was 262.9MB in the beginning and 248.7MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-01 11:07:48,768 INFO L158 Benchmark]: TraceAbstraction took 3917.20ms. Allocated memory is still 333.4MB. Free memory was 248.2MB in the beginning and 111.9MB in the end (delta: 136.3MB). Peak memory consumption was 137.1MB. Max. memory is 8.0GB. [2023-04-01 11:07:48,769 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 183.5MB. Free memory is still 132.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.38ms. Allocated memory is still 333.4MB. Free memory was 274.4MB in the beginning and 264.4MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.78ms. Allocated memory is still 333.4MB. Free memory was 264.4MB in the beginning and 262.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 407.52ms. Allocated memory is still 333.4MB. Free memory was 262.9MB in the beginning and 248.7MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 3917.20ms. Allocated memory is still 333.4MB. Free memory was 248.2MB in the beginning and 111.9MB in the end (delta: 136.3MB). Peak memory consumption was 137.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 64 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27 IncrementalHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 35 mSDtfsCounter, 27 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 49 HoareAnnotationTreeSize, 9 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 60 ConstructedInterpolants, 4 QuantifiedInterpolants, 973 SizeOfPredicates, 4 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: x <= 4294967296 * (x / 4294967296) + (-4294967296 * (x / 4294967296) + x) / 3 * 3 || 0 < y % 4294967296 RESULT: Ultimate proved your program to be correct! [2023-04-01 11:07:48,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...