/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/css2003.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:23:18,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:23:18,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:23:18,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:23:18,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:23:18,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:23:18,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:23:18,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:23:18,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:23:18,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:23:18,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:23:18,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:23:18,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:23:18,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:23:18,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:23:18,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:23:18,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:23:18,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:23:18,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:23:18,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:23:18,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:23:18,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:23:18,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:23:18,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:23:18,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:23:18,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:23:18,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:23:18,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:23:18,917 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:23:18,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:23:18,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:23:18,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:23:18,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:23:18,937 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:23:18,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:23:18,938 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:23:18,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:23:18,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:23:18,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:23:18,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:23:18,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:23:18,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:23:18,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:23:18,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:23:18,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:23:18,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:23:18,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:23:18,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:23:18,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:23:18,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:23:18,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:23:18,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:23:18,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:23:18,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:23:18,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:23:18,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:18,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:23:18,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:23:18,944 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:23:19,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:23:19,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:23:19,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:23:19,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:23:19,282 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:23:19,283 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/css2003.i [2020-07-21 23:23:19,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26ba5c52/f27bb283daf845ae8716f446081ffcf3/FLAGec1b5d89f [2020-07-21 23:23:19,856 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:23:19,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/css2003.i [2020-07-21 23:23:19,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26ba5c52/f27bb283daf845ae8716f446081ffcf3/FLAGec1b5d89f [2020-07-21 23:23:20,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26ba5c52/f27bb283daf845ae8716f446081ffcf3 [2020-07-21 23:23:20,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:23:20,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:23:20,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:23:20,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:23:20,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:23:20,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae6d6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20, skipping insertion in model container [2020-07-21 23:23:20,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:23:20,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:23:20,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:23:20,545 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:23:20,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:23:20,585 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:23:20,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20 WrapperNode [2020-07-21 23:23:20,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:23:20,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:23:20,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:23:20,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:23:20,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (1/1) ... [2020-07-21 23:23:20,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:23:20,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:23:20,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:23:20,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:23:20,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 23:23:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:23:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:23:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:23:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:23:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:23:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:23:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:23:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:23:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:23:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:23:20,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:23:20,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:23:20,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:23:20,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:23:20,967 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:23:20,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:20 BoogieIcfgContainer [2020-07-21 23:23:20,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:23:20,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:23:20,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:23:20,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:23:20,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:23:20" (1/3) ... [2020-07-21 23:23:20,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183d0219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:20, skipping insertion in model container [2020-07-21 23:23:20,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:20" (2/3) ... [2020-07-21 23:23:20,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183d0219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:20, skipping insertion in model container [2020-07-21 23:23:20,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:20" (3/3) ... [2020-07-21 23:23:20,979 INFO L109 eAbstractionObserver]: Analyzing ICFG css2003.i [2020-07-21 23:23:20,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:23:20,995 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:23:21,009 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:23:21,031 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:23:21,031 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:23:21,031 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:23:21,031 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:23:21,031 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:23:21,031 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:23:21,031 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:23:21,031 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:23:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 23:23:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:23:21,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:21,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:21,055 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1610750385, now seen corresponding path program 1 times [2020-07-21 23:23:21,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:21,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190644838] [2020-07-21 23:23:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:21,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:21,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:23:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:21,314 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:23:21,318 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:23:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:21,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:21,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190644838] [2020-07-21 23:23:21,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:21,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:23:21,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706510377] [2020-07-21 23:23:21,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:23:21,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:21,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:23:21,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:23:21,380 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2020-07-21 23:23:21,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:21,498 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-21 23:23:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:23:21,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-21 23:23:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:21,509 INFO L225 Difference]: With dead ends: 41 [2020-07-21 23:23:21,509 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 23:23:21,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:23:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 23:23:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-21 23:23:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 23:23:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 23:23:21,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-07-21 23:23:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:21,557 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 23:23:21,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:23:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 23:23:21,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 23:23:21,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:21,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:21,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:21,774 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:21,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1220418797, now seen corresponding path program 1 times [2020-07-21 23:23:21,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:21,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885399857] [2020-07-21 23:23:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:21,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:21,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:21,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 23:23:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:21,885 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:23:21,888 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:23:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:21,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:21,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:22,022 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 23:23:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:22,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885399857] [2020-07-21 23:23:22,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:23:22,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2020-07-21 23:23:22,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370189532] [2020-07-21 23:23:22,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:23:22,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:22,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:23:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:23:22,046 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-07-21 23:23:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:22,113 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-07-21 23:23:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:23:22,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 23:23:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:22,114 INFO L225 Difference]: With dead ends: 20 [2020-07-21 23:23:22,115 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:23:22,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:23:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:23:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:23:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:23:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:23:22,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-21 23:23:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:22,118 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:23:22,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:23:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:23:22,119 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:23:22,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:22,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:23:22,438 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:23:22,438 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:23:22,438 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:23:22,439 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:23:22,439 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:23:22,439 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:23:22,439 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:23:22,439 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 23:23:22,439 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:23:22,440 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:23:22,440 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-07-21 23:23:22,440 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-07-21 23:23:22,440 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= .cse0 2) (<= 1 main_~i~0) (<= 1 .cse0))) [2020-07-21 23:23:22,441 INFO L264 CegarLoopResult]: At program point L23-1(lines 19 24) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= .cse0 2) (<= 1 main_~i~0) (<= 1 .cse0))) [2020-07-21 23:23:22,441 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-21 23:23:22,441 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 24) no Hoare annotation was computed. [2020-07-21 23:23:22,441 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-07-21 23:23:22,442 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 23:23:22,442 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 23:23:22,442 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 23:23:22,442 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 23:23:22,442 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 23:23:22,443 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 23:23:22,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:23:22 BoogieIcfgContainer [2020-07-21 23:23:22,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:23:22,479 INFO L168 Benchmark]: Toolchain (without parser) took 2231.91 ms. Allocated memory was 139.5 MB in the beginning and 234.4 MB in the end (delta: 94.9 MB). Free memory was 104.5 MB in the beginning and 206.0 MB in the end (delta: -101.5 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:22,481 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:23:22,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.08 ms. Allocated memory is still 139.5 MB. Free memory was 104.1 MB in the beginning and 94.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:22,483 INFO L168 Benchmark]: Boogie Preprocessor took 125.65 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 94.3 MB in the beginning and 182.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:22,484 INFO L168 Benchmark]: RCFGBuilder took 257.83 ms. Allocated memory is still 201.9 MB. Free memory was 182.0 MB in the beginning and 169.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:22,485 INFO L168 Benchmark]: TraceAbstraction took 1504.03 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 168.5 MB in the beginning and 206.0 MB in the end (delta: -37.5 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:22,489 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.08 ms. Allocated memory is still 139.5 MB. Free memory was 104.1 MB in the beginning and 94.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.65 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 94.3 MB in the beginning and 182.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 257.83 ms. Allocated memory is still 201.9 MB. Free memory was 182.0 MB in the beginning and 169.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1504.03 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 168.5 MB in the beginning and 206.0 MB in the end (delta: -37.5 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: (i + k <= 2 && 1 <= i) && 1 <= i + k - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 14 SDslu, 97 SDs, 0 SdLazy, 52 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=1, 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 33 HoareAnnotationTreeSize, 9 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 2632 SizeOfPredicates, 5 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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...