/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_vardep_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:12:52,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:12:52,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:12:52,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:12:52,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:12:52,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:12:52,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:12:52,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:12:52,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:12:52,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:12:52,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:12:52,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:12:52,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:12:52,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:12:52,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:12:52,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:12:52,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:12:52,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:12:52,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:12:52,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:12:52,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:12:52,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:12:52,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:12:52,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:12:52,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:12:52,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:12:52,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:12:52,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:12:52,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:12:52,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:12:52,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:12:52,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:12:52,952 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:12:52,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:12:52,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:12:52,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:12:52,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:12:52,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:12:52,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:12:52,953 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:12:52,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:12:52,953 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:12:52,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:12:52,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:12:52,954 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:12:52,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:12:52,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:12:52,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:12:52,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:12:52,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:12:52,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:12:52,955 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 23:12:53,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:12:53,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:12:53,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:12:53,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:12:53,469 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:12:53,470 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_vardep_2.c [2020-09-04 23:12:53,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69c4ba3be/b55ecbb169664220b3d07e11af8ded30/FLAG87620991f [2020-09-04 23:12:54,187 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:12:54,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c [2020-09-04 23:12:54,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69c4ba3be/b55ecbb169664220b3d07e11af8ded30/FLAG87620991f [2020-09-04 23:12:54,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69c4ba3be/b55ecbb169664220b3d07e11af8ded30 [2020-09-04 23:12:54,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:12:54,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:12:54,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:12:54,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:12:54,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:12:54,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40dc6253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54, skipping insertion in model container [2020-09-04 23:12:54,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:12:54,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:12:54,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:12:54,809 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:12:54,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:12:54,854 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:12:54,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54 WrapperNode [2020-09-04 23:12:54,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:12:54,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:12:54,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:12:54,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:12:54,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (1/1) ... [2020-09-04 23:12:54,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:12:54,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:12:54,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:12:54,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:12:54,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:12:55,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:12:55,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:12:55,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:12:55,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:12:55,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:12:55,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:12:55,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:12:55,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:12:55,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:12:55,261 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:12:55,261 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:12:55,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:12:55 BoogieIcfgContainer [2020-09-04 23:12:55,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:12:55,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:12:55,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:12:55,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:12:55,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:12:54" (1/3) ... [2020-09-04 23:12:55,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10671cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:12:55, skipping insertion in model container [2020-09-04 23:12:55,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:12:54" (2/3) ... [2020-09-04 23:12:55,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10671cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:12:55, skipping insertion in model container [2020-09-04 23:12:55,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:12:55" (3/3) ... [2020-09-04 23:12:55,299 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_vardep_2.c [2020-09-04 23:12:55,330 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:12:55,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:12:55,396 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:12:55,435 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:12:55,435 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:12:55,435 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:12:55,436 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:12:55,436 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:12:55,436 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:12:55,436 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:12:55,436 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:12:55,452 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-04 23:12:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 23:12:55,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:55,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:55,467 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash -420526341, now seen corresponding path program 1 times [2020-09-04 23:12:55,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:55,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150880142] [2020-09-04 23:12:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:56,393 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2020-09-04 23:12:56,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:56,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150880142] [2020-09-04 23:12:56,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:12:56,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 23:12:56,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310084824] [2020-09-04 23:12:56,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:12:56,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:56,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:12:56,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:12:56,492 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 10 states. [2020-09-04 23:12:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:56,732 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-09-04 23:12:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:12:56,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-09-04 23:12:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:56,747 INFO L225 Difference]: With dead ends: 50 [2020-09-04 23:12:56,748 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 23:12:56,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:12:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 23:12:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-04 23:12:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 23:12:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-04 23:12:56,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 15 [2020-09-04 23:12:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:56,817 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-04 23:12:56,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:12:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-04 23:12:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 23:12:56,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:56,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:56,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:12:56,820 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1780540834, now seen corresponding path program 1 times [2020-09-04 23:12:56,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:56,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733172699] [2020-09-04 23:12:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:57,370 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2020-09-04 23:12:57,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:57,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:12:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 23:12:57,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733172699] [2020-09-04 23:12:57,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:57,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:12:57,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664441718] [2020-09-04 23:12:57,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:12:57,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:57,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:12:57,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:12:57,430 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-09-04 23:12:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:57,553 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-09-04 23:12:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:12:57,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-04 23:12:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:57,555 INFO L225 Difference]: With dead ends: 27 [2020-09-04 23:12:57,555 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 23:12:57,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:12:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 23:12:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 23:12:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 23:12:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 23:12:57,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-09-04 23:12:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:57,559 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 23:12:57,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:12:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 23:12:57,559 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 23:12:57,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:12:57,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 23:12:57,754 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:12:57,755 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:12:57,755 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:12:57,755 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 23:12:57,755 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 23:12:57,756 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:12:57,756 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-09-04 23:12:57,756 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 26) the Hoare annotation is: true [2020-09-04 23:12:57,757 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= .cse1 main_~k~0) (<= main_~k~0 .cse1))) [2020-09-04 23:12:57,757 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (let ((.cse1 (* 3 main_~i~0)) (.cse0 (+ main_~k~0 3)) (.cse2 (* 2 main_~i~0))) (and (<= .cse0 .cse1) (<= .cse2 main_~j~0) (<= .cse1 .cse0) (<= main_~j~0 .cse2))) [2020-09-04 23:12:57,757 INFO L264 CegarLoopResult]: At program point L23-1(lines 19 24) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= .cse1 main_~k~0) (<= main_~k~0 .cse1))) [2020-09-04 23:12:57,758 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (let ((.cse1 (* 3 main_~i~0)) (.cse0 (+ main_~k~0 3)) (.cse3 (* 2 main_~i~0)) (.cse2 (+ main_~j~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse2 .cse3) (<= .cse3 .cse2))) [2020-09-04 23:12:57,758 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= .cse1 main_~k~0) (<= main_~k~0 .cse1))) [2020-09-04 23:12:57,758 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= main_~i~0 0) (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= 0 main_~i~0))) [2020-09-04 23:12:57,758 INFO L271 CegarLoopResult]: At program point L19-2(lines 13 26) the Hoare annotation is: true [2020-09-04 23:12:57,759 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~i~0)) [2020-09-04 23:12:57,759 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 11) the Hoare annotation is: true [2020-09-04 23:12:57,759 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 5 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:12:57,759 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:12:57,759 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:12:57,760 INFO L264 CegarLoopResult]: At program point L7-2(lines 5 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:12:57,760 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:12:57,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:12:57 BoogieIcfgContainer [2020-09-04 23:12:57,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:12:57,790 INFO L168 Benchmark]: Toolchain (without parser) took 3260.57 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 103.7 MB in the beginning and 133.7 MB in the end (delta: -30.0 MB). Peak memory consumption was 65.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:12:57,792 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 139.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:12:57,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.98 ms. Allocated memory is still 139.5 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:12:57,794 INFO L168 Benchmark]: Boogie Preprocessor took 109.11 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 94.1 MB in the beginning and 181.5 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-09-04 23:12:57,795 INFO L168 Benchmark]: RCFGBuilder took 306.84 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:12:57,796 INFO L168 Benchmark]: TraceAbstraction took 2511.03 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 169.7 MB in the beginning and 133.7 MB in the end (delta: 36.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. [2020-09-04 23:12:57,801 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 139.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.98 ms. Allocated memory is still 139.5 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.11 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 94.1 MB in the beginning and 181.5 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.84 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2511.03 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 169.7 MB in the beginning and 133.7 MB in the end (delta: 36.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: ((2 * i <= j && j <= 2 * i) && 3 * i <= k) && k <= 3 * i - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: 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, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 27 SDslu, 116 SDs, 0 SdLazy, 117 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=1, 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 34 PreInvPairs, 53 NumberOfFragments, 181 HoareAnnotationTreeSize, 34 FomulaSimplifications, 243 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 12699 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 5/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...