/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/loops/while_infinite_loop_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:46:14,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:14,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:14,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:46:14,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:46:14,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:46:14,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:46:14,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:46:14,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:46:14,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:46:14,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:46:14,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:46:14,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:14,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:14,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:14,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:14,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:14,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:14,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:14,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:14,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:14,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:14,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:14,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:14,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:46:14,946 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 19:46:14,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:14,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:14,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:14,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:14,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:14,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:14,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:14,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:14,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:14,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:14,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:14,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:14,965 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:14,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:14,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:14,966 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:14,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:14,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:14,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:14,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:14,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:14,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:14,967 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:15,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:15,294 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:15,297 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:15,299 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:15,300 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:15,300 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_2.c [2020-08-22 19:46:15,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ff322cea/34386393965843168d176a64bd2a1c19/FLAG8041ad8c3 [2020-08-22 19:46:15,859 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:15,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_2.c [2020-08-22 19:46:15,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ff322cea/34386393965843168d176a64bd2a1c19/FLAG8041ad8c3 [2020-08-22 19:46:16,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ff322cea/34386393965843168d176a64bd2a1c19 [2020-08-22 19:46:16,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:16,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:16,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:16,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:16,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:16,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c31b5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16, skipping insertion in model container [2020-08-22 19:46:16,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:16,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:16,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:16,413 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:16,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:16,441 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:16,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16 WrapperNode [2020-08-22 19:46:16,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:16,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:16,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:16,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:16,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:16,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:16,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:16,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:16,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (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 19:46:16,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:16,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:16,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:16,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:16,754 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:16,754 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:46:16,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:16 BoogieIcfgContainer [2020-08-22 19:46:16,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:16,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:16,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:16,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:16,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:16" (1/3) ... [2020-08-22 19:46:16,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1460ec52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:16, skipping insertion in model container [2020-08-22 19:46:16,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (2/3) ... [2020-08-22 19:46:16,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1460ec52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:16, skipping insertion in model container [2020-08-22 19:46:16,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:16" (3/3) ... [2020-08-22 19:46:16,767 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_2.c [2020-08-22 19:46:16,778 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:16,785 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:16,799 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:16,822 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:16,822 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:16,822 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:16,822 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:16,822 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:16,823 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:16,823 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:16,823 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-22 19:46:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 19:46:16,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:16,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:16,849 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:16,856 INFO L82 PathProgramCache]: Analyzing trace with hash -10313984, now seen corresponding path program 1 times [2020-08-22 19:46:16,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:16,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255616691] [2020-08-22 19:46:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:16,918 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:16,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:16,973 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 19:46:16,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255616691] [2020-08-22 19:46:16,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:16,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:46:16,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659740665] [2020-08-22 19:46:16,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:46:16,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:16,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:46:16,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:46:16,995 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-08-22 19:46:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:17,018 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2020-08-22 19:46:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:46:17,019 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 19:46:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:17,027 INFO L225 Difference]: With dead ends: 26 [2020-08-22 19:46:17,027 INFO L226 Difference]: Without dead ends: 13 [2020-08-22 19:46:17,030 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 19:46:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-22 19:46:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-22 19:46:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-22 19:46:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-22 19:46:17,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-08-22 19:46:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:17,062 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-22 19:46:17,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:46:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-22 19:46:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 19:46:17,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:17,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:17,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:17,064 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash -13144129, now seen corresponding path program 1 times [2020-08-22 19:46:17,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:17,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317910458] [2020-08-22 19:46:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:17,067 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,174 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 19:46:17,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317910458] [2020-08-22 19:46:17,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:17,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:46:17,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681439594] [2020-08-22 19:46:17,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:46:17,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:46:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:46:17,187 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-08-22 19:46:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:17,243 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-08-22 19:46:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:46:17,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 19:46:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:17,245 INFO L225 Difference]: With dead ends: 13 [2020-08-22 19:46:17,245 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:46:17,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:46:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:46:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:46:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:46:17,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-08-22 19:46:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:17,257 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:46:17,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:46:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:46:17,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:46:17,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:17,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:46:17,414 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:46:17,414 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:46:17,415 INFO L264 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: false [2020-08-22 19:46:17,415 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:46:17,415 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:46:17,415 INFO L264 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: false [2020-08-22 19:46:17,416 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 18) the Hoare annotation is: true [2020-08-22 19:46:17,416 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 9 18) the Hoare annotation is: false [2020-08-22 19:46:17,416 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= main_~x~0 0) [2020-08-22 19:46:17,417 INFO L264 CegarLoopResult]: At program point L14-1(lines 12 15) the Hoare annotation is: (= main_~x~0 0) [2020-08-22 19:46:17,417 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 9 18) the Hoare annotation is: false [2020-08-22 19:46:17,417 INFO L264 CegarLoopResult]: At program point L12-2(lines 12 15) the Hoare annotation is: false [2020-08-22 19:46:17,418 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 19:46:17,418 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:46:17,418 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:46:17,419 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:46:17,419 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:46:17,419 INFO L264 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:46:17,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:46:17 BoogieIcfgContainer [2020-08-22 19:46:17,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:46:17,439 INFO L168 Benchmark]: Toolchain (without parser) took 1209.86 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 104.8 MB in the beginning and 132.4 MB in the end (delta: -27.6 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,441 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,441 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.80 ms. Allocated memory is still 147.3 MB. Free memory was 104.5 MB in the beginning and 94.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,443 INFO L168 Benchmark]: Boogie Preprocessor took 107.17 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 94.8 MB in the beginning and 184.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,444 INFO L168 Benchmark]: RCFGBuilder took 208.89 ms. Allocated memory is still 204.5 MB. Free memory was 184.4 MB in the beginning and 174.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,444 INFO L168 Benchmark]: TraceAbstraction took 676.74 ms. Allocated memory is still 204.5 MB. Free memory was 173.3 MB in the beginning and 132.4 MB in the end (delta: 40.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,449 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 211.80 ms. Allocated memory is still 147.3 MB. Free memory was 104.5 MB in the beginning and 94.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.17 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 94.8 MB in the beginning and 184.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 208.89 ms. Allocated memory is still 204.5 MB. Free memory was 184.4 MB in the beginning and 174.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 676.74 ms. Allocated memory is still 204.5 MB. Free memory was 173.3 MB in the beginning and 132.4 MB in the end (delta: 40.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: x == 0 - ProcedureContractResult [Line: 9]: Procedure Contract for main Derived contract for procedure main: 0 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 5 SDslu, 19 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 30 PreInvPairs, 34 NumberOfFragments, 47 HoareAnnotationTreeSize, 30 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, 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 correct! Received shutdown request...