/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 0.2.0-7d8eed3 [2020-11-07 00:25:25,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:25:25,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:25:25,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:25:25,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:25:25,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:25:25,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:25:25,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:25:25,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:25:25,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:25:25,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:25:25,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:25:25,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:25:25,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:25:25,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:25:25,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:25:25,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:25:25,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:25:25,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:25:25,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:25:25,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:25:25,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:25:25,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:25:25,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:25:25,992 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:25:25,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:25:25,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:25:25,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:25:25,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:25:25,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:25:25,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:25:25,994 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:25:25,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:25:25,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:25:25,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:25:25,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:25:25,996 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:25:25,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:25:25,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:25:25,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:25:25,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:25:25,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:25:25,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:25:25,997 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:25:26,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:25:26,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:25:26,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:25:26,440 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:25:26,441 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:25:26,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-11-07 00:25:26,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a451efd4/aaf1e14d818045839893ebdd82ae503c/FLAG0ca91d3fc [2020-11-07 00:25:27,137 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:25:27,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-11-07 00:25:27,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a451efd4/aaf1e14d818045839893ebdd82ae503c/FLAG0ca91d3fc [2020-11-07 00:25:27,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a451efd4/aaf1e14d818045839893ebdd82ae503c [2020-11-07 00:25:27,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:25:27,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:25:27,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:27,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:25:27,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:25:27,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e2f24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27, skipping insertion in model container [2020-11-07 00:25:27,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:25:27,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:25:27,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:27,762 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:25:27,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:27,805 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:25:27,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27 WrapperNode [2020-11-07 00:25:27,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:27,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:25:27,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:25:27,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:25:27,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (1/1) ... [2020-11-07 00:25:27,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:25:27,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:25:27,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:25:27,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:25:27,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (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 [2020-11-07 00:25:27,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:25:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:25:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:25:27,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 00:25:27,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:25:27,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:25:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:25:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:25:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:25:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 00:25:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 00:25:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:25:27,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:25:27,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:25:27,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:25:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:25:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:25:27,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:25:28,394 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:25:28,395 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 00:25:28,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:28 BoogieIcfgContainer [2020-11-07 00:25:28,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:25:28,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:25:28,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:25:28,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:25:28,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:25:27" (1/3) ... [2020-11-07 00:25:28,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9186bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:28, skipping insertion in model container [2020-11-07 00:25:28,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:27" (2/3) ... [2020-11-07 00:25:28,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9186bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:28, skipping insertion in model container [2020-11-07 00:25:28,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:28" (3/3) ... [2020-11-07 00:25:28,408 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-11-07 00:25:28,429 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:25:28,433 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:25:28,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:25:28,498 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:25:28,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:25:28,501 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:25:28,501 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:25:28,501 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:25:28,501 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:25:28,502 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:25:28,502 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:25:28,538 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-11-07 00:25:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 00:25:28,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:28,553 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] [2020-11-07 00:25:28,553 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2057954194, now seen corresponding path program 1 times [2020-11-07 00:25:28,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:28,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024747234] [2020-11-07 00:25:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:28,685 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:29,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:25:29,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024747234] [2020-11-07 00:25:29,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:29,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 00:25:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885280369] [2020-11-07 00:25:29,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 00:25:29,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:29,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 00:25:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:25:29,107 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 3 states. [2020-11-07 00:25:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:29,215 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2020-11-07 00:25:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 00:25:29,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-07 00:25:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:29,240 INFO L225 Difference]: With dead ends: 75 [2020-11-07 00:25:29,240 INFO L226 Difference]: Without dead ends: 54 [2020-11-07 00:25:29,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:25:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-07 00:25:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-07 00:25:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-07 00:25:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-11-07 00:25:29,316 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 21 [2020-11-07 00:25:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:29,317 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-11-07 00:25:29,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 00:25:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-11-07 00:25:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 00:25:29,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:29,319 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] [2020-11-07 00:25:29,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:25:29,319 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash -404152792, now seen corresponding path program 1 times [2020-11-07 00:25:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:29,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637688496] [2020-11-07 00:25:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:29,325 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:29,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:25:29,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637688496] [2020-11-07 00:25:29,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:29,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:25:29,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198728633] [2020-11-07 00:25:29,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:25:29,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:25:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:25:29,514 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 4 states. [2020-11-07 00:25:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:29,771 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-11-07 00:25:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:25:29,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-07 00:25:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:29,774 INFO L225 Difference]: With dead ends: 65 [2020-11-07 00:25:29,774 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 00:25:29,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 00:25:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-11-07 00:25:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-07 00:25:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-11-07 00:25:29,799 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 21 [2020-11-07 00:25:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:29,799 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-11-07 00:25:29,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:25:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-11-07 00:25:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 00:25:29,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:29,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:29,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:25:29,802 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:29,803 INFO L82 PathProgramCache]: Analyzing trace with hash 507958482, now seen corresponding path program 1 times [2020-11-07 00:25:29,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:29,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222089312] [2020-11-07 00:25:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:29,826 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:29,828 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:29,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:25:29,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222089312] [2020-11-07 00:25:29,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:29,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:25:29,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800262381] [2020-11-07 00:25:29,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:25:29,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:25:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:25:29,914 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 4 states. [2020-11-07 00:25:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:30,152 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2020-11-07 00:25:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:25:30,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-11-07 00:25:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:30,156 INFO L225 Difference]: With dead ends: 106 [2020-11-07 00:25:30,156 INFO L226 Difference]: Without dead ends: 67 [2020-11-07 00:25:30,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-07 00:25:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-11-07 00:25:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 00:25:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-11-07 00:25:30,177 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 42 [2020-11-07 00:25:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:30,178 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-11-07 00:25:30,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:25:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-11-07 00:25:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 00:25:30,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:30,180 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:30,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:25:30,180 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1929474098, now seen corresponding path program 1 times [2020-11-07 00:25:30,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:30,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518282291] [2020-11-07 00:25:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:30,407 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-11-07 00:25:30,410 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:30,414 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:30,491 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:30,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:30,549 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:25:30,550 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:25:30,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:25:30,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:25:30 BoogieIcfgContainer [2020-11-07 00:25:30,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:25:30,574 INFO L168 Benchmark]: Toolchain (without parser) took 3038.03 ms. Allocated memory was 125.8 MB in the beginning and 167.8 MB in the end (delta: 41.9 MB). Free memory was 102.5 MB in the beginning and 110.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 34.2 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:30,575 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 103.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:25:30,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.43 ms. Allocated memory is still 125.8 MB. Free memory was 101.8 MB in the beginning and 92.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:30,577 INFO L168 Benchmark]: Boogie Preprocessor took 46.42 ms. Allocated memory is still 125.8 MB. Free memory was 92.0 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:30,578 INFO L168 Benchmark]: RCFGBuilder took 542.84 ms. Allocated memory was 125.8 MB in the beginning and 167.8 MB in the end (delta: 41.9 MB). Free memory was 90.5 MB in the beginning and 147.4 MB in the end (delta: -56.9 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:30,579 INFO L168 Benchmark]: TraceAbstraction took 2172.84 ms. Allocated memory is still 167.8 MB. Free memory was 146.9 MB in the beginning and 110.8 MB in the end (delta: 36.1 MB). Peak memory consumption was 36.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:30,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 103.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 264.43 ms. Allocated memory is still 125.8 MB. Free memory was 101.8 MB in the beginning and 92.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.42 ms. Allocated memory is still 125.8 MB. Free memory was 92.0 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 542.84 ms. Allocated memory was 125.8 MB in the beginning and 167.8 MB in the end (delta: 41.9 MB). Free memory was 90.5 MB in the beginning and 147.4 MB in the end (delta: -56.9 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2172.84 ms. Allocated memory is still 167.8 MB. Free memory was 146.9 MB in the beginning and 110.8 MB in the end (delta: 36.1 MB). Peak memory consumption was 36.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L19] x += 2 [L21] COND FALSE !(y % 2 == 0) [L22] x -= 2 [L24] COND FALSE !(y % 2 == 0) [L25] x += 2 [L27] COND FALSE !(y % 2 == 0) [L28] x -= 2 [L30] COND FALSE !(y % 2 == 0) [L31] x += 2 [L33] COND FALSE !(y % 2 == 0) [L34] x -= 4 [L36] COND FALSE !(y % 2 == 0) [L37] x += 4 [L39] COND FALSE !(y % 2 == 0) [L40] x += 2 [L42] COND FALSE !(y % 2 == 0) [L43] x -= 4 [L45] COND FALSE !(y % 2 == 0) [L46] x -= 4 [L17] COND FALSE !(x < 99) [L49] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L7] COND TRUE !(cond) [L8] CALL reach_error() [L3] __assert_fail("0", "diamond_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 186 SDtfs, 192 SDslu, 38 SDs, 0 SdLazy, 113 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred 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...