/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:33:18,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:33:18,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:33:18,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:33:18,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:33:18,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:33:18,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:33:18,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:33:18,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:33:18,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:33:18,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:33:18,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:33:18,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:33:18,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:33:18,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:33:18,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:33:18,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:33:18,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:33:18,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:33:18,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:33:18,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:33:18,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:33:18,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:33:18,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:33:18,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:33:18,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:33:18,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:33:18,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:33:18,205 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 18:33:18,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:33:18,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:33:18,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:33:18,223 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:33:18,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:33:18,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:33:18,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:33:18,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:33:18,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:33:18,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:33:18,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:33:18,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:33:18,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:33:18,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:33:18,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:33:18,227 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:33:18,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:33:18,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:33:18,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:33:18,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:33:18,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:33:18,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:33:18,228 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:33:18,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:33:18,513 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:33:18,519 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:33:18,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:33:18,521 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:33:18,522 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-22 18:33:18,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93a74019a/055641d0b6c04ef89c6ca4971572b636/FLAG4e83ed255 [2020-08-22 18:33:19,072 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:33:19,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-22 18:33:19,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93a74019a/055641d0b6c04ef89c6ca4971572b636/FLAG4e83ed255 [2020-08-22 18:33:19,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93a74019a/055641d0b6c04ef89c6ca4971572b636 [2020-08-22 18:33:19,442 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:33:19,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:33:19,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:19,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:33:19,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:33:19,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30914678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19, skipping insertion in model container [2020-08-22 18:33:19,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:33:19,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:33:19,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:19,691 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:33:19,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:19,731 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:33:19,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19 WrapperNode [2020-08-22 18:33:19,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:19,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:33:19,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:33:19,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:33:19,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (1/1) ... [2020-08-22 18:33:19,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:33:19,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:33:19,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:33:19,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:33:19,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (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 18:33:19,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:33:19,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:33:19,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 18:33:19,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:33:19,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:33:19,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 18:33:19,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 18:33:19,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:33:19,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:33:19,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:33:20,162 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:33:20,163 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 18:33:20,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:20 BoogieIcfgContainer [2020-08-22 18:33:20,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:33:20,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:33:20,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:33:20,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:33:20,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:33:19" (1/3) ... [2020-08-22 18:33:20,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f99ec1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:20, skipping insertion in model container [2020-08-22 18:33:20,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:19" (2/3) ... [2020-08-22 18:33:20,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f99ec1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:20, skipping insertion in model container [2020-08-22 18:33:20,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:20" (3/3) ... [2020-08-22 18:33:20,176 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-08-22 18:33:20,190 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:33:20,204 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:33:20,232 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:33:20,279 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:33:20,280 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:33:20,280 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:33:20,280 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:33:20,280 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:33:20,281 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:33:20,281 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:33:20,281 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:33:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-08-22 18:33:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 18:33:20,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:20,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:20,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:20,319 INFO L82 PathProgramCache]: Analyzing trace with hash -7732671, now seen corresponding path program 1 times [2020-08-22 18:33:20,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:20,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263248320] [2020-08-22 18:33:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:20,400 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,454 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 18:33:20,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263248320] [2020-08-22 18:33:20,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:20,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 18:33:20,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373521145] [2020-08-22 18:33:20,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 18:33:20,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:20,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 18:33:20,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 18:33:20,477 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-08-22 18:33:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:20,503 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-08-22 18:33:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 18:33:20,504 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-08-22 18:33:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:20,511 INFO L225 Difference]: With dead ends: 62 [2020-08-22 18:33:20,512 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 18:33:20,515 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 18:33:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 18:33:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 18:33:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 18:33:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-08-22 18:33:20,556 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 12 [2020-08-22 18:33:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:20,557 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-08-22 18:33:20,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 18:33:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-08-22 18:33:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 18:33:20,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:20,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:20,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:33:20,559 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash -87155477, now seen corresponding path program 1 times [2020-08-22 18:33:20,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:20,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287309716] [2020-08-22 18:33:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:20,563 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,677 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 18:33:20,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287309716] [2020-08-22 18:33:20,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:20,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:33:20,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434590126] [2020-08-22 18:33:20,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:33:20,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:33:20,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:33:20,681 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-08-22 18:33:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:20,754 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-08-22 18:33:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:33:20,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-22 18:33:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:20,756 INFO L225 Difference]: With dead ends: 55 [2020-08-22 18:33:20,757 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 18:33:20,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:33:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 18:33:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-08-22 18:33:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 18:33:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-08-22 18:33:20,772 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 12 [2020-08-22 18:33:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:20,773 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-08-22 18:33:20,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:33:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-08-22 18:33:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 18:33:20,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:20,775 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, 1, 1, 1, 1, 1] [2020-08-22 18:33:20,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:33:20,775 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:20,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516068, now seen corresponding path program 1 times [2020-08-22 18:33:20,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:20,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447956000] [2020-08-22 18:33:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:20,792 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,837 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 18:33:20,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447956000] [2020-08-22 18:33:20,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:20,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:33:20,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628097452] [2020-08-22 18:33:20,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:33:20,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:20,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:33:20,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:33:20,841 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 3 states. [2020-08-22 18:33:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:20,941 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-08-22 18:33:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:33:20,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 18:33:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:20,945 INFO L225 Difference]: With dead ends: 96 [2020-08-22 18:33:20,945 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 18:33:20,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:33:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 18:33:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-22 18:33:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 18:33:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-08-22 18:33:20,960 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 33 [2020-08-22 18:33:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:20,960 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-08-22 18:33:20,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:33:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-08-22 18:33:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 18:33:20,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:20,962 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, 1, 1, 1, 1, 1] [2020-08-22 18:33:20,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:33:20,963 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:20,963 INFO L82 PathProgramCache]: Analyzing trace with hash 132907260, now seen corresponding path program 1 times [2020-08-22 18:33:20,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:20,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738516113] [2020-08-22 18:33:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:20,990 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:33:21,048 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:33:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:33:21,091 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:33:21,131 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:33:21,131 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:33:21,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:33:21,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:33:21 BoogieIcfgContainer [2020-08-22 18:33:21,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:33:21,153 INFO L168 Benchmark]: Toolchain (without parser) took 1708.37 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 108.1 MB in the end (delta: -6.1 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:21,155 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:33:21,156 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.43 ms. Allocated memory is still 137.9 MB. Free memory was 101.8 MB in the beginning and 91.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:21,157 INFO L168 Benchmark]: Boogie Preprocessor took 119.20 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 179.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:21,158 INFO L168 Benchmark]: RCFGBuilder took 315.97 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:21,159 INFO L168 Benchmark]: TraceAbstraction took 981.51 ms. Allocated memory is still 201.9 MB. Free memory was 162.7 MB in the beginning and 108.1 MB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:21,163 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.43 ms. Allocated memory is still 137.9 MB. Free memory was 101.8 MB in the beginning and 91.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.20 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 179.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.97 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 981.51 ms. Allocated memory is still 201.9 MB. Free memory was 162.7 MB in the beginning and 108.1 MB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 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: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 24 SDslu, 53 SDs, 0 SdLazy, 47 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=3, 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, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...