/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:15:24,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:15:24,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:15:24,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:15:24,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:15:24,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:15:24,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:15:24,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:15:24,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:15:24,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:15:24,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:15:24,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:15:24,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:15:24,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:15:24,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:15:24,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:15:24,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:15:24,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:15:24,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:15:24,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:15:24,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:15:24,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:15:24,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:15:24,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:15:24,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:15:24,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:15:24,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:15:24,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:15:24,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:15:24,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:15:24,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:15:24,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:15:24,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:15:24,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:15:24,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:15:24,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:15:24,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:15:24,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:15:24,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:15:24,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:15:24,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:15:24,251 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:15:24,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:15:24,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:15:24,252 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:15:24,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:15:24,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:15:24,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:15:24,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:15:24,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:15:24,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:15:24,253 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 23:15:24,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:15:24,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:15:24,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:15:24,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:15:24,566 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:15:24,567 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2020-08-22 23:15:24,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ff1bff23/4b9855be71ec45c68b1ebe3280b9858f/FLAG7747076ec [2020-08-22 23:15:25,042 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:15:25,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c [2020-08-22 23:15:25,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ff1bff23/4b9855be71ec45c68b1ebe3280b9858f/FLAG7747076ec [2020-08-22 23:15:25,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ff1bff23/4b9855be71ec45c68b1ebe3280b9858f [2020-08-22 23:15:25,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:15:25,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:15:25,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:15:25,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:15:25,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:15:25,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c9ac3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25, skipping insertion in model container [2020-08-22 23:15:25,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:15:25,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:15:25,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:15:25,689 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:15:25,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:15:25,718 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:15:25,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25 WrapperNode [2020-08-22 23:15:25,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:15:25,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:15:25,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:15:25,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:15:25,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (1/1) ... [2020-08-22 23:15:25,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:15:25,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:15:25,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:15:25,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:15:25,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (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 [2020-08-22 23:15:25,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:15:25,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:15:25,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:15:25,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:15:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:15:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:15:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:15:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:15:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:15:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:15:26,066 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:15:26,066 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:15:26,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:15:26 BoogieIcfgContainer [2020-08-22 23:15:26,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:15:26,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:15:26,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:15:26,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:15:26,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:15:25" (1/3) ... [2020-08-22 23:15:26,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0a9de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:15:26, skipping insertion in model container [2020-08-22 23:15:26,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:15:25" (2/3) ... [2020-08-22 23:15:26,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0a9de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:15:26, skipping insertion in model container [2020-08-22 23:15:26,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:15:26" (3/3) ... [2020-08-22 23:15:26,078 INFO L109 eAbstractionObserver]: Analyzing ICFG mod4.c [2020-08-22 23:15:26,088 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:15:26,095 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:15:26,108 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:15:26,129 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:15:26,129 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:15:26,129 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:15:26,130 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:15:26,130 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:15:26,130 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:15:26,130 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:15:26,130 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:15:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-22 23:15:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 23:15:26,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:26,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:15:26,153 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:26,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1137787585, now seen corresponding path program 1 times [2020-08-22 23:15:26,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:26,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867472319] [2020-08-22 23:15:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:26,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:26,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867472319] [2020-08-22 23:15:26,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:15:26,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:15:26,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062481513] [2020-08-22 23:15:26,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:15:26,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:15:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:15:26,303 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-08-22 23:15:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:26,327 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-08-22 23:15:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:15:26,328 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 23:15:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:26,335 INFO L225 Difference]: With dead ends: 34 [2020-08-22 23:15:26,336 INFO L226 Difference]: Without dead ends: 15 [2020-08-22 23:15:26,339 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 [2020-08-22 23:15:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-22 23:15:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-22 23:15:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 23:15:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-22 23:15:26,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2020-08-22 23:15:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:26,370 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-22 23:15:26,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:15:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-22 23:15:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 23:15:26,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:26,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:15:26,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:15:26,372 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1424281528, now seen corresponding path program 1 times [2020-08-22 23:15:26,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:26,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834043314] [2020-08-22 23:15:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:26,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:26,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834043314] [2020-08-22 23:15:26,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:15:26,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:15:26,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636010467] [2020-08-22 23:15:26,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:15:26,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:15:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:15:26,547 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-08-22 23:15:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:26,587 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-08-22 23:15:26,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:15:26,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-22 23:15:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:26,588 INFO L225 Difference]: With dead ends: 15 [2020-08-22 23:15:26,588 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:15:26,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:15:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:15:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:15:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:15:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:15:26,592 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-08-22 23:15:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:26,593 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:15:26,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:15:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:15:26,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:15:26,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:15:26,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:15:26,774 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:15:26,774 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:15:26,774 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:15:26,775 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:15:26,775 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:15:26,775 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:15:26,775 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 16) the Hoare annotation is: true [2020-08-22 23:15:26,776 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 9 16) the Hoare annotation is: true [2020-08-22 23:15:26,776 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 23:15:26,776 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 9 16) the Hoare annotation is: true [2020-08-22 23:15:26,777 INFO L264 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (* 4 .cse0)))) [2020-08-22 23:15:26,778 INFO L264 CegarLoopResult]: At program point L11-1(lines 11 13) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (* 4 .cse0)))) [2020-08-22 23:15:26,778 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (* 4 .cse0)))) [2020-08-22 23:15:26,779 INFO L264 CegarLoopResult]: At program point L11-4(line 11) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (* 4 .cse0)))) [2020-08-22 23:15:26,779 INFO L264 CegarLoopResult]: At program point L11-5(lines 11 13) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (* 4 .cse0)))) [2020-08-22 23:15:26,779 INFO L264 CegarLoopResult]: At program point L11-6(lines 11 13) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (* 4 .cse0)))) [2020-08-22 23:15:26,780 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 23:15:26,780 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-08-22 23:15:26,780 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:15:26,780 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:15:26,781 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:15:26,781 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-08-22 23:15:26,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:15:26 BoogieIcfgContainer [2020-08-22 23:15:26,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:15:26,802 INFO L168 Benchmark]: Toolchain (without parser) took 1309.09 ms. Allocated memory was 141.0 MB in the beginning and 206.0 MB in the end (delta: 65.0 MB). Free memory was 105.2 MB in the beginning and 130.4 MB in the end (delta: -25.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:26,803 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:15:26,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.19 ms. Allocated memory is still 141.0 MB. Free memory was 105.0 MB in the beginning and 95.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:26,809 INFO L168 Benchmark]: Boogie Preprocessor took 123.12 ms. Allocated memory was 141.0 MB in the beginning and 206.0 MB in the end (delta: 65.0 MB). Free memory was 95.8 MB in the beginning and 185.2 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:26,810 INFO L168 Benchmark]: RCFGBuilder took 227.84 ms. Allocated memory is still 206.0 MB. Free memory was 184.5 MB in the beginning and 173.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:26,811 INFO L168 Benchmark]: TraceAbstraction took 728.24 ms. Allocated memory is still 206.0 MB. Free memory was 172.5 MB in the beginning and 130.4 MB in the end (delta: 42.2 MB). Peak memory consumption was 42.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:26,815 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.19 ms. Allocated memory is still 141.0 MB. Free memory was 105.0 MB in the beginning and 95.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.12 ms. Allocated memory was 141.0 MB in the beginning and 206.0 MB in the end (delta: 65.0 MB). Free memory was 95.8 MB in the beginning and 185.2 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 227.84 ms. Allocated memory is still 206.0 MB. Free memory was 184.5 MB in the beginning and 173.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 728.24 ms. Allocated memory is still 206.0 MB. Free memory was 172.5 MB in the beginning and 130.4 MB in the end (delta: 42.2 MB). Peak memory consumption was 42.2 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) - ProcedureContractResult [Line: 9]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 3 SDslu, 26 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 22 LocationsWithAnnotation, 28 PreInvPairs, 36 NumberOfFragments, 117 HoareAnnotationTreeSize, 28 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 5 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 884 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...