/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/count_up_down-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:01:03,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:01:03,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:01:03,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:01:03,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:01:03,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:01:03,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:01:03,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:01:03,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:01:03,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:01:03,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:01:03,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:01:03,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:01:03,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:01:03,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:01:03,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:01:03,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:01:03,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:01:03,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:01:03,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:01:03,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:01:03,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:01:03,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:01:03,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:01:03,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:01:03,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:01:03,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:01:03,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:01:03,099 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 23:01:03,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:01:03,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:01:03,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:01:03,112 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:01:03,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:01:03,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:01:03,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:01:03,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:01:03,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:01:03,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:01:03,114 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:01:03,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:01:03,114 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:01:03,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:01:03,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:01:03,115 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:01:03,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:01:03,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:01:03,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:03,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:01:03,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:01:03,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:01:03,116 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 23:01:03,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:01:03,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:01:03,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:01:03,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:01:03,462 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:01:03,463 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-2.c [2020-08-22 23:01:03,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f1c61e6/8089d670023f407faa01f54369374cc0/FLAG946d7e4d7 [2020-08-22 23:01:04,066 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:01:04,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down-2.c [2020-08-22 23:01:04,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f1c61e6/8089d670023f407faa01f54369374cc0/FLAG946d7e4d7 [2020-08-22 23:01:04,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f1c61e6/8089d670023f407faa01f54369374cc0 [2020-08-22 23:01:04,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:01:04,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:01:04,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:04,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:01:04,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:01:04,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5545c67b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04, skipping insertion in model container [2020-08-22 23:01:04,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:01:04,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:01:04,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:04,641 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:01:04,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:04,679 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:01:04,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04 WrapperNode [2020-08-22 23:01:04,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:04,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:01:04,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:01:04,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:01:04,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (1/1) ... [2020-08-22 23:01:04,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:01:04,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:01:04,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:01:04,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:01:04,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (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 23:01:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:01:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:01:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:01:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:01:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:01:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:01:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 23:01:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:01:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:01:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:01:05,028 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:01:05,028 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:01:05,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:05 BoogieIcfgContainer [2020-08-22 23:01:05,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:01:05,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:01:05,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:01:05,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:01:05,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:01:04" (1/3) ... [2020-08-22 23:01:05,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b949b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:05, skipping insertion in model container [2020-08-22 23:01:05,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:04" (2/3) ... [2020-08-22 23:01:05,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b949b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:05, skipping insertion in model container [2020-08-22 23:01:05,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:05" (3/3) ... [2020-08-22 23:01:05,040 INFO L109 eAbstractionObserver]: Analyzing ICFG count_up_down-2.c [2020-08-22 23:01:05,051 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:01:05,058 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:01:05,073 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:01:05,104 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:01:05,104 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:01:05,104 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:01:05,104 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:01:05,105 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:01:05,105 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:01:05,105 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:01:05,105 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:01:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-22 23:01:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 23:01:05,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:05,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:05,138 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1049095342, now seen corresponding path program 1 times [2020-08-22 23:01:05,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:05,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681462196] [2020-08-22 23:01:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:05,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:05,294 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 23:01:05,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681462196] [2020-08-22 23:01:05,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:05,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:01:05,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532014791] [2020-08-22 23:01:05,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:01:05,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:05,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:01:05,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:01:05,320 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-08-22 23:01:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:05,345 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-08-22 23:01:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:01:05,347 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-08-22 23:01:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:05,355 INFO L225 Difference]: With dead ends: 37 [2020-08-22 23:01:05,356 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 23:01:05,359 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 23:01:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 23:01:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-22 23:01:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 23:01:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-08-22 23:01:05,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2020-08-22 23:01:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:05,399 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-08-22 23:01:05,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:01:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-08-22 23:01:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 23:01:05,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:05,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:05,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:01:05,402 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:05,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:05,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1039860132, now seen corresponding path program 1 times [2020-08-22 23:01:05,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:05,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786948010] [2020-08-22 23:01:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:01:05,444 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:01:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:01:05,458 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:01:05,474 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:01:05,474 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:01:05,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:01:05,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:01:05 BoogieIcfgContainer [2020-08-22 23:01:05,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:01:05,496 INFO L168 Benchmark]: Toolchain (without parser) took 1065.73 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 101.7 MB in the beginning and 144.5 MB in the end (delta: -42.8 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:05,497 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:01:05,498 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.61 ms. Allocated memory is still 137.4 MB. Free memory was 101.5 MB in the beginning and 92.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:05,499 INFO L168 Benchmark]: Boogie Preprocessor took 105.11 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 180.8 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:05,500 INFO L168 Benchmark]: RCFGBuilder took 245.72 ms. Allocated memory is still 200.8 MB. Free memory was 180.8 MB in the beginning and 167.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:05,501 INFO L168 Benchmark]: TraceAbstraction took 460.08 ms. Allocated memory is still 200.8 MB. Free memory was 167.3 MB in the beginning and 144.5 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:05,506 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.61 ms. Allocated memory is still 137.4 MB. Free memory was 101.5 MB in the beginning and 92.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.11 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 180.8 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.72 ms. Allocated memory is still 200.8 MB. Free memory was 180.8 MB in the beginning and 167.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 460.08 ms. Allocated memory is still 200.8 MB. Free memory was 167.3 MB in the beginning and 144.5 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int n = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=0, n=0] [L14] unsigned int x=n, y=0; VAL [n=0, x=0, y=0] [L15] COND FALSE !(x>0) VAL [n=0, x=0, y=0] [L20] CALL __VERIFIER_assert(y!=n) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 144 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 incorrect! Received shutdown request...