/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-acceleration/simple_3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:11:41,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:11:41,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:11:41,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:11:41,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:11:41,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:11:41,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:11:41,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:11:41,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:11:41,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:11:41,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:11:41,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:11:41,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:11:41,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:11:41,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:11:41,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:11:41,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:11:41,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:11:41,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:11:41,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:11:41,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:11:41,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:11:41,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:11:41,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:11:41,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:11:41,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:11:41,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:11:41,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:11:41,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:11:41,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:11:41,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:11:41,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:11:41,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:11:41,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:11:41,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:11:41,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:11:41,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:11:41,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:11:41,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:11:41,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:11:41,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:11:41,543 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 23:11:41,556 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:11:41,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:11:41,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:11:41,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:11:41,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:11:41,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:11:41,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:11:41,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:11:41,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:11:41,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:11:41,560 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:11:41,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:11:41,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:11:41,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:11:41,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:11:41,561 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:11:41,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:11:41,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:11:41,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:11:41,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:11:41,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:11:41,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:11:41,562 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 23:11:42,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:11:42,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:11:42,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:11:42,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:11:42,042 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:11:42,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-09-04 23:11:42,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35b478dc/e0d16e9d052046e3ab4b97629a261845/FLAG2c89fc263 [2020-09-04 23:11:42,718 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:11:42,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-09-04 23:11:42,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35b478dc/e0d16e9d052046e3ab4b97629a261845/FLAG2c89fc263 [2020-09-04 23:11:43,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35b478dc/e0d16e9d052046e3ab4b97629a261845 [2020-09-04 23:11:43,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:11:43,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:11:43,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:43,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:11:43,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:11:43,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc17a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43, skipping insertion in model container [2020-09-04 23:11:43,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:11:43,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:11:43,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:43,327 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:11:43,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:43,362 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:11:43,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43 WrapperNode [2020-09-04 23:11:43,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:43,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:11:43,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:11:43,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:11:43,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (1/1) ... [2020-09-04 23:11:43,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:11:43,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:11:43,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:11:43,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:11:43,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (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 23:11:43,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:11:43,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:11:43,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:11:43,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:11:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:11:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-09-04 23:11:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:11:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:11:43,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:11:43,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:11:43,762 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:11:43,762 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:11:43,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:43 BoogieIcfgContainer [2020-09-04 23:11:43,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:11:43,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:11:43,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:11:43,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:11:43,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:11:43" (1/3) ... [2020-09-04 23:11:43,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270ca139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:43, skipping insertion in model container [2020-09-04 23:11:43,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:43" (2/3) ... [2020-09-04 23:11:43,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270ca139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:43, skipping insertion in model container [2020-09-04 23:11:43,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:43" (3/3) ... [2020-09-04 23:11:43,778 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2020-09-04 23:11:43,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:11:43,797 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:11:43,818 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:11:43,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:11:43,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:11:43,847 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:11:43,847 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:11:43,847 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:11:43,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:11:43,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:11:43,848 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:11:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-04 23:11:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 23:11:43,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:43,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:43,876 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1456818433, now seen corresponding path program 1 times [2020-09-04 23:11:43,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:43,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658924548] [2020-09-04 23:11:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:44,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:44,031 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 23:11:44,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658924548] [2020-09-04 23:11:44,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:44,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 23:11:44,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170157436] [2020-09-04 23:11:44,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 23:11:44,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:44,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 23:11:44,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:11:44,064 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-09-04 23:11:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:44,097 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-09-04 23:11:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 23:11:44,099 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-04 23:11:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:44,110 INFO L225 Difference]: With dead ends: 31 [2020-09-04 23:11:44,111 INFO L226 Difference]: Without dead ends: 14 [2020-09-04 23:11:44,115 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 [2020-09-04 23:11:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-04 23:11:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-04 23:11:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-04 23:11:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-09-04 23:11:44,167 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-09-04 23:11:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:44,167 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-09-04 23:11:44,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 23:11:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-09-04 23:11:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 23:11:44,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:44,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:44,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:11:44,170 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1452200828, now seen corresponding path program 1 times [2020-09-04 23:11:44,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:44,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857771685] [2020-09-04 23:11:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:44,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:44,363 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 23:11:44,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857771685] [2020-09-04 23:11:44,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:44,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:11:44,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389431694] [2020-09-04 23:11:44,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:11:44,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:44,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:11:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:11:44,370 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-09-04 23:11:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:44,423 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-09-04 23:11:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:11:44,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-04 23:11:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:44,425 INFO L225 Difference]: With dead ends: 14 [2020-09-04 23:11:44,425 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 23:11:44,426 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 [2020-09-04 23:11:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 23:11:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 23:11:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 23:11:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 23:11:44,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-09-04 23:11:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:44,428 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 23:11:44,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:11:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 23:11:44,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 23:11:44,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:11:44,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 23:11:44,582 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:11:44,582 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:11:44,583 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:11:44,583 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 23:11:44,583 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 23:11:44,583 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:11:44,583 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 20) the Hoare annotation is: true [2020-09-04 23:11:44,584 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 11 20) the Hoare annotation is: true [2020-09-04 23:11:44,584 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2020-09-04 23:11:44,585 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2020-09-04 23:11:44,585 INFO L264 CegarLoopResult]: At program point L15-2(lines 15 17) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2020-09-04 23:11:44,585 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 11 20) the Hoare annotation is: true [2020-09-04 23:11:44,586 INFO L264 CegarLoopResult]: At program point L13-1(line 13) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2020-09-04 23:11:44,586 INFO L264 CegarLoopResult]: At program point L15-3(lines 15 17) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2020-09-04 23:11:44,586 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-09-04 23:11:44,587 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 4 9) the Hoare annotation is: true [2020-09-04 23:11:44,587 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:11:44,587 INFO L264 CegarLoopResult]: At program point L5(lines 5 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:11:44,588 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:11:44,588 INFO L271 CegarLoopResult]: At program point L5-2(lines 4 9) the Hoare annotation is: true [2020-09-04 23:11:44,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:11:44 BoogieIcfgContainer [2020-09-04 23:11:44,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:11:44,617 INFO L168 Benchmark]: Toolchain (without parser) took 1552.87 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 104.6 MB in the beginning and 129.6 MB in the end (delta: -25.0 MB). Peak memory consumption was 32.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:44,618 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 147.3 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:11:44,619 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.57 ms. Allocated memory is still 147.3 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:44,620 INFO L168 Benchmark]: Boogie Preprocessor took 117.24 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 95.1 MB in the beginning and 184.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:44,621 INFO L168 Benchmark]: RCFGBuilder took 286.25 ms. Allocated memory is still 205.0 MB. Free memory was 184.2 MB in the beginning and 171.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:44,622 INFO L168 Benchmark]: TraceAbstraction took 845.11 ms. Allocated memory is still 205.0 MB. Free memory was 171.9 MB in the beginning and 129.6 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:44,627 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 147.3 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.57 ms. Allocated memory is still 147.3 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.24 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 95.1 MB in the beginning and 184.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 286.25 ms. Allocated memory is still 205.0 MB. Free memory was 184.2 MB in the beginning and 171.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 845.11 ms. Allocated memory is still 205.0 MB. Free memory was 171.9 MB in the beginning and 129.6 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 15]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) && 0 <= x - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 4]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 2 SDslu, 20 SDs, 0 SdLazy, 11 SolverSat, 1 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=20occurred 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, 20 LocationsWithAnnotation, 26 PreInvPairs, 33 NumberOfFragments, 81 HoareAnnotationTreeSize, 26 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 20 FomulaSimplificationsInter, 5 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 748 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...