/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:42:54,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:42:54,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:42:54,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:42:54,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:42:54,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:42:54,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:42:54,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:42:54,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:42:54,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:42:54,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:42:54,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:42:54,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:42:54,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:42:54,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:42:54,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:42:54,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:42:54,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:42:54,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:42:54,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:42:54,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:42:54,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:42:54,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:42:54,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:42:54,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:42:54,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:42:54,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:42:54,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:42:54,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:42:54,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:42:54,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:42:54,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:42:54,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:42:54,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:42:54,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:42:54,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:42:54,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:42:54,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:42:54,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:42:54,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:42:54,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:42:54,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:42:54,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:42:54,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:42:54,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:42:54,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:42:54,862 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:42:54,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:42:54,863 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:42:54,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:42:54,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:42:54,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:42:54,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:42:54,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:42:54,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:42:54,865 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:42:54,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:42:54,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:42:54,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:42:54,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:42:54,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:42:54,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:42:54,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:42:54,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:42:54,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:42:54,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:42:54,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:42:54,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:42:54,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:42:54,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:42:54,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:42:54,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:42:55,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:42:55,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:42:55,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:42:55,145 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:42:55,145 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:42:55,146 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2020-08-21 20:42:55,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dee4842c/3af15b058e744ecd972a7c514c5fcd2c/FLAG3b2adad0e [2020-08-21 20:42:55,655 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:42:55,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invariants/mod4.c [2020-08-21 20:42:55,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dee4842c/3af15b058e744ecd972a7c514c5fcd2c/FLAG3b2adad0e [2020-08-21 20:42:56,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5dee4842c/3af15b058e744ecd972a7c514c5fcd2c [2020-08-21 20:42:56,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:42:56,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:42:56,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:42:56,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:42:56,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:42:56,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3425936a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56, skipping insertion in model container [2020-08-21 20:42:56,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:42:56,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:42:56,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:42:56,239 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:42:56,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:42:56,272 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:42:56,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56 WrapperNode [2020-08-21 20:42:56,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:42:56,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:42:56,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:42:56,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:42:56,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (1/1) ... [2020-08-21 20:42:56,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:42:56,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:42:56,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:42:56,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:42:56,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:42:56,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:42:56,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:42:56,437 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 20:42:56,437 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:42:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:42:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:42:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 20:42:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:42:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:42:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:42:56,590 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:42:56,591 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 20:42:56,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:42:56 BoogieIcfgContainer [2020-08-21 20:42:56,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:42:56,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:42:56,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:42:56,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:42:56,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:42:56" (1/3) ... [2020-08-21 20:42:56,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d3d746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:42:56, skipping insertion in model container [2020-08-21 20:42:56,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:56" (2/3) ... [2020-08-21 20:42:56,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d3d746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:42:56, skipping insertion in model container [2020-08-21 20:42:56,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:42:56" (3/3) ... [2020-08-21 20:42:56,602 INFO L109 eAbstractionObserver]: Analyzing ICFG mod4.c [2020-08-21 20:42:56,611 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:42:56,618 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:42:56,629 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:42:56,650 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:42:56,650 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:42:56,651 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:42:56,651 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:42:56,651 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:42:56,651 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:42:56,651 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:42:56,651 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:42:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-21 20:42:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 20:42:56,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:56,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:56,673 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:56,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2020-08-21 20:42:56,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:56,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266502131] [2020-08-21 20:42:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:56,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:42:56,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266502131] [2020-08-21 20:42:56,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:42:56,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 20:42:56,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583194211] [2020-08-21 20:42:56,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 20:42:56,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:42:56,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 20:42:56,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 20:42:56,803 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-21 20:42:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:42:56,825 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-08-21 20:42:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 20:42:56,826 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 20:42:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:42:56,834 INFO L225 Difference]: With dead ends: 31 [2020-08-21 20:42:56,834 INFO L226 Difference]: Without dead ends: 12 [2020-08-21 20:42:56,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 20:42:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-21 20:42:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-21 20:42:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-21 20:42:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-08-21 20:42:56,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-08-21 20:42:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:42:56,874 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-08-21 20:42:56,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 20:42:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-08-21 20:42:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 20:42:56,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:56,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:42:56,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:42:56,875 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:56,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1890620952, now seen corresponding path program 1 times [2020-08-21 20:42:56,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:56,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076893456] [2020-08-21 20:42:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,651 WARN L193 SmtUtils]: Spent 3.64 s on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-08-21 20:43:00,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:00,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076893456] [2020-08-21 20:43:00,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:00,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:43:00,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547092962] [2020-08-21 20:43:00,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:43:00,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:00,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:43:00,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:43:00,691 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-08-21 20:43:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:00,734 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-08-21 20:43:00,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:43:00,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-21 20:43:00,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:00,735 INFO L225 Difference]: With dead ends: 12 [2020-08-21 20:43:00,736 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 20:43:00,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:43:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 20:43:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 20:43:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 20:43:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 20:43:00,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-08-21 20:43:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:00,739 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 20:43:00,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:43:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 20:43:00,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 20:43:00,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:43:00,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 20:43:00,787 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 20:43:00,787 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 20:43:00,787 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 20:43:00,788 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 20:43:00,788 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 20:43:00,788 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 20:43:00,788 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 16) the Hoare annotation is: true [2020-08-21 20:43:00,789 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 16) no Hoare annotation was computed. [2020-08-21 20:43:00,789 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-08-21 20:43:00,789 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 16) no Hoare annotation was computed. [2020-08-21 20:43:00,789 INFO L268 CegarLoopResult]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2020-08-21 20:43:00,790 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (+ (* 4 .cse0) (* 4294967296 (div (+ main_~x~0 (* .cse0 (- 4))) 4294967296)))))) [2020-08-21 20:43:00,790 INFO L264 CegarLoopResult]: At program point L11-4(lines 11 13) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (+ (* 4 .cse0) (* 4294967296 (div (+ main_~x~0 (* .cse0 (- 4))) 4294967296)))))) [2020-08-21 20:43:00,790 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 20:43:00,791 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 20:43:00,791 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 20:43:00,791 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 20:43:00,791 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 20:43:00,792 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 20:43:00,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:43:00 BoogieIcfgContainer [2020-08-21 20:43:00,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:43:00,810 INFO L168 Benchmark]: Toolchain (without parser) took 4776.36 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 104.3 MB in the beginning and 130.9 MB in the end (delta: -26.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:00,811 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-21 20:43:00,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.47 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 94.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:00,813 INFO L168 Benchmark]: Boogie Preprocessor took 95.37 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.6 MB in the beginning and 182.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:00,814 INFO L168 Benchmark]: RCFGBuilder took 223.60 ms. Allocated memory is still 202.9 MB. Free memory was 182.6 MB in the beginning and 171.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:00,815 INFO L168 Benchmark]: TraceAbstraction took 4213.03 ms. Allocated memory is still 202.9 MB. Free memory was 170.3 MB in the beginning and 130.9 MB in the end (delta: 39.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:00,819 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.47 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 94.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.37 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.6 MB in the beginning and 182.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 223.60 ms. Allocated memory is still 202.9 MB. Free memory was 182.6 MB in the beginning and 171.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4213.03 ms. Allocated memory is still 202.9 MB. Free memory was 170.3 MB in the beginning and 130.9 MB in the end (delta: 39.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 < x / 4 + 1 && x <= 4 * (x / 4) + 4294967296 * ((x + x / 4 * -4) / 4294967296) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 1 SDslu, 20 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 59 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 1021 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...