/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/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:10:30,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:10:30,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:10:30,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:10:30,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:10:30,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:10:30,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:10:30,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:10:30,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:10:30,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:10:30,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:10:30,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:10:30,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:10:30,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:10:30,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:10:30,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:10:30,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:10:30,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:10:30,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:10:30,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:10:30,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:10:30,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:10:30,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:10:30,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:10:30,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:10:30,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:10:30,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:10:30,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:10:30,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:10:30,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:10:30,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:10:30,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:10:30,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:10:30,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:10:30,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:10:30,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:10:30,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:10:30,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:10:30,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:10:30,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:10:30,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:10:30,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:10:30,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:10:30,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:10:30,634 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:10:30,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:10:30,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:10:30,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:10:30,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:10:30,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:10:30,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:10:30,635 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 [2020-09-04 23:10:31,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:10:31,132 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:10:31,136 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:10:31,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:10:31,139 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:10:31,140 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-09-04 23:10:31,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde1c0589/5ed2343b8e83406fb4dd7413578e690d/FLAG2c0a128ae [2020-09-04 23:10:31,770 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:10:31,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/nec20.c [2020-09-04 23:10:31,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde1c0589/5ed2343b8e83406fb4dd7413578e690d/FLAG2c0a128ae [2020-09-04 23:10:32,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde1c0589/5ed2343b8e83406fb4dd7413578e690d [2020-09-04 23:10:32,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:10:32,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:10:32,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:32,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:10:32,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:10:32,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2016f310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32, skipping insertion in model container [2020-09-04 23:10:32,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:10:32,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:10:32,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:32,405 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:10:32,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:32,446 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:10:32,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32 WrapperNode [2020-09-04 23:10:32,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:32,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:10:32,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:10:32,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:10:32,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (1/1) ... [2020-09-04 23:10:32,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:10:32,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:10:32,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:10:32,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:10:32,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (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 [2020-09-04 23:10:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:10:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:10:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:10:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:10:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:10:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 23:10:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:10:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 23:10:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:10:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:10:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:10:32,944 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:10:32,945 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:10:32,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:32 BoogieIcfgContainer [2020-09-04 23:10:32,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:10:32,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:10:32,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:10:32,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:10:32,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:10:32" (1/3) ... [2020-09-04 23:10:32,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:32, skipping insertion in model container [2020-09-04 23:10:32,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:32" (2/3) ... [2020-09-04 23:10:32,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:32, skipping insertion in model container [2020-09-04 23:10:32,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:32" (3/3) ... [2020-09-04 23:10:32,978 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-09-04 23:10:32,992 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:10:33,001 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:10:33,020 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:10:33,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:10:33,046 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:10:33,047 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:10:33,047 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:10:33,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:10:33,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:10:33,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:10:33,047 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:10:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-09-04 23:10:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 23:10:33,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:33,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:33,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:33,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1806400052, now seen corresponding path program 1 times [2020-09-04 23:10:33,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:33,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119190770] [2020-09-04 23:10:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:33,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:33,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119190770] [2020-09-04 23:10:33,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:33,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:10:33,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946500168] [2020-09-04 23:10:33,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:10:33,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:10:33,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:33,518 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-09-04 23:10:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:33,858 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-09-04 23:10:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:10:33,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-04 23:10:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:33,874 INFO L225 Difference]: With dead ends: 85 [2020-09-04 23:10:33,874 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 23:10:33,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:10:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 23:10:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-04 23:10:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 23:10:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-04 23:10:33,937 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 23 [2020-09-04 23:10:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:33,937 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-04 23:10:33,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:10:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-04 23:10:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 23:10:33,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:33,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:33,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:10:33,940 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1097761428, now seen corresponding path program 1 times [2020-09-04 23:10:33,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:33,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986165885] [2020-09-04 23:10:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:34,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986165885] [2020-09-04 23:10:34,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:34,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:10:34,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252853422] [2020-09-04 23:10:34,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:10:34,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:34,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:10:34,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:34,062 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 5 states. [2020-09-04 23:10:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:34,219 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-09-04 23:10:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:10:34,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-04 23:10:34,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:34,222 INFO L225 Difference]: With dead ends: 50 [2020-09-04 23:10:34,222 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 23:10:34,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:10:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 23:10:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-09-04 23:10:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 23:10:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 23:10:34,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-09-04 23:10:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:34,234 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 23:10:34,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:10:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 23:10:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 23:10:34,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:34,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:34,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:10:34,236 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1269377587, now seen corresponding path program 1 times [2020-09-04 23:10:34,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:34,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310340826] [2020-09-04 23:10:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:34,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:34,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310340826] [2020-09-04 23:10:34,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:34,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:10:34,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851252908] [2020-09-04 23:10:34,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:10:34,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:34,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:10:34,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:10:34,457 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2020-09-04 23:10:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:34,858 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-09-04 23:10:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 23:10:34,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-04 23:10:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:34,860 INFO L225 Difference]: With dead ends: 55 [2020-09-04 23:10:34,860 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 23:10:34,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:10:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 23:10:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-09-04 23:10:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 23:10:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 23:10:34,875 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 28 [2020-09-04 23:10:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:34,875 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 23:10:34,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:10:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 23:10:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 23:10:34,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:34,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:34,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:10:34,878 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1258948973, now seen corresponding path program 1 times [2020-09-04 23:10:34,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:34,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480109008] [2020-09-04 23:10:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:34,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:34,937 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:34,973 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:10:34,974 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:10:34,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:10:35,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:10:35 BoogieIcfgContainer [2020-09-04 23:10:35,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:10:35,024 INFO L168 Benchmark]: Toolchain (without parser) took 2893.83 ms. Allocated memory was 145.8 MB in the beginning and 235.4 MB in the end (delta: 89.7 MB). Free memory was 102.1 MB in the beginning and 134.0 MB in the end (delta: -31.9 MB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:35,026 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 145.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 23:10:35,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.80 ms. Allocated memory is still 145.8 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:35,029 INFO L168 Benchmark]: Boogie Preprocessor took 130.73 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:35,030 INFO L168 Benchmark]: RCFGBuilder took 385.17 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 166.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:35,036 INFO L168 Benchmark]: TraceAbstraction took 2053.92 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 166.0 MB in the beginning and 134.0 MB in the end (delta: 32.0 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:35,046 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 145.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.80 ms. Allocated memory is still 145.8 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.73 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 385.17 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 166.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2053.92 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 166.0 MB in the beginning and 134.0 MB in the end (delta: 32.0 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int b; VAL [\old(b)=1026, b=0] [L13] _Bool k=__VERIFIER_nondet_bool(); VAL [__VERIFIER_nondet_bool()=257, b=0, k=1] [L14] unsigned int i,n,j; VAL [b=0, k=1] [L15] int a[1025]; VAL [b=0, k=1] [L17] COND TRUE \read(k) VAL [b=0, k=1] [L18] n=0 VAL [b=0, k=1, n=0] [L23] i=0 VAL [b=0, i=0, k=1, n=0] [L24] j=__VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=1023, b=0, i=0, j=1023, k=1, n=0] [L25] COND FALSE !(j > 10000) VAL [b=0, i=0, j=1023, k=1, n=0] [L28] COND TRUE i <= n VAL [b=0, i=0, j=1023, k=1, n=0] [L29] i++ VAL [b=0, i=1, j=1023, k=1, n=0] [L30] j= j +2 VAL [b=0, i=1, j=1025, k=1, n=0] [L28] COND FALSE !(i <= n) VAL [b=0, i=1, j=1025, k=1, n=0] [L33] a[i]=0 VAL [b=0, i=1, j=1025, k=1, n=0] [L34] CALL __VERIFIER_assert(j<1025) VAL [\old(cond)=0, b=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, b=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, b=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 177 SDslu, 74 SDs, 0 SdLazy, 304 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 3 MinimizatonAttempts, 33 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 12063 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 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 incorrect! Received shutdown request...