/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/phases_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:07:12,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:07:12,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:07:12,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:07:12,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:07:12,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:07:12,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:07:12,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:07:12,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:07:12,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:07:12,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:07:12,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:07:12,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:07:12,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:07:12,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:07:12,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:07:12,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:07:12,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:07:12,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:07:12,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:07:12,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:07:12,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:07:12,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:07:12,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:07:12,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:07:12,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:07:12,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:07:12,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:07:12,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:07:12,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:07:12,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:07:12,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:07:12,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:07:12,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:07:12,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:07:12,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:07:12,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:07:12,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:07:12,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:07:12,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:07:12,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:07:12,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:07:12,146 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:07:12,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:07:12,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:07:12,149 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:07:12,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:07:12,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:07:12,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:07:12,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:07:12,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:07:12,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:07:12,151 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:07:12,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:07:12,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:07:12,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:07:12,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:07:12,152 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:07:12,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:07:12,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:07:12,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:07:12,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:07:12,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:07:12,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:07:12,154 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 [2020-07-17 18:07:12,464 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:07:12,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:07:12,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:07:12,482 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:07:12,483 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:07:12,483 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-07-17 18:07:12,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8997d909/9457192e73974f49b9816e69b37ed591/FLAG669352ccf [2020-07-17 18:07:13,062 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:07:13,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-07-17 18:07:13,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8997d909/9457192e73974f49b9816e69b37ed591/FLAG669352ccf [2020-07-17 18:07:13,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8997d909/9457192e73974f49b9816e69b37ed591 [2020-07-17 18:07:13,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:07:13,432 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:07:13,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:07:13,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:07:13,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:07:13,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66867e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13, skipping insertion in model container [2020-07-17 18:07:13,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:07:13,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:07:13,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:07:13,693 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:07:13,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:07:13,736 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:07:13,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13 WrapperNode [2020-07-17 18:07:13,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:07:13,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:07:13,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:07:13,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:07:13,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (1/1) ... [2020-07-17 18:07:13,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:07:13,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:07:13,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:07:13,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:07:13,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (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 [2020-07-17 18:07:14,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:07:14,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:07:14,065 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:07:14,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:07:14,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:07:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:07:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:07:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:07:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-17 18:07:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:07:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:07:14,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:07:14,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:07:14,284 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:07:14,285 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 18:07:14,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:07:14 BoogieIcfgContainer [2020-07-17 18:07:14,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:07:14,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:07:14,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:07:14,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:07:14,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:07:13" (1/3) ... [2020-07-17 18:07:14,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5ce787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:07:14, skipping insertion in model container [2020-07-17 18:07:14,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:13" (2/3) ... [2020-07-17 18:07:14,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5ce787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:07:14, skipping insertion in model container [2020-07-17 18:07:14,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:07:14" (3/3) ... [2020-07-17 18:07:14,338 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-1.c [2020-07-17 18:07:14,369 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:07:14,381 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:07:14,401 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:07:14,430 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:07:14,430 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:07:14,430 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:07:14,431 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:07:14,431 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:07:14,431 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:07:14,431 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:07:14,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:07:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-17 18:07:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 18:07:14,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:14,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:14,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:14,484 INFO L82 PathProgramCache]: Analyzing trace with hash 31250732, now seen corresponding path program 1 times [2020-07-17 18:07:14,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:14,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681541173] [2020-07-17 18:07:14,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:07:14,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681541173] [2020-07-17 18:07:14,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:14,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 18:07:14,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90497853] [2020-07-17 18:07:14,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 18:07:14,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:14,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 18:07:14,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 18:07:14,694 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-07-17 18:07:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:14,726 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-07-17 18:07:14,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 18:07:14,728 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-17 18:07:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:14,738 INFO L225 Difference]: With dead ends: 37 [2020-07-17 18:07:14,738 INFO L226 Difference]: Without dead ends: 19 [2020-07-17 18:07:14,743 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 [2020-07-17 18:07:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-17 18:07:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-17 18:07:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-17 18:07:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-17 18:07:14,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2020-07-17 18:07:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:14,791 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-17 18:07:14,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 18:07:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-17 18:07:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 18:07:14,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:14,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:14,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:07:14,793 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:14,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:14,794 INFO L82 PathProgramCache]: Analyzing trace with hash 18321438, now seen corresponding path program 1 times [2020-07-17 18:07:14,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:14,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026075570] [2020-07-17 18:07:14,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:07:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:07:14,866 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:07:14,866 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:07:14,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:07:14,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:07:14 BoogieIcfgContainer [2020-07-17 18:07:14,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:07:14,901 INFO L168 Benchmark]: Toolchain (without parser) took 1468.88 ms. Allocated memory was 144.7 MB in the beginning and 207.1 MB in the end (delta: 62.4 MB). Free memory was 102.9 MB in the beginning and 150.8 MB in the end (delta: -47.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:14,902 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 18:07:14,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.15 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:14,904 INFO L168 Benchmark]: Boogie Preprocessor took 33.97 ms. Allocated memory is still 144.7 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:14,905 INFO L168 Benchmark]: RCFGBuilder took 518.94 ms. Allocated memory was 144.7 MB in the beginning and 207.1 MB in the end (delta: 62.4 MB). Free memory was 91.4 MB in the beginning and 173.0 MB in the end (delta: -81.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:14,906 INFO L168 Benchmark]: TraceAbstraction took 586.58 ms. Allocated memory is still 207.1 MB. Free memory was 173.0 MB in the beginning and 150.8 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:14,910 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.15 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.97 ms. Allocated memory is still 144.7 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 518.94 ms. Allocated memory was 144.7 MB in the beginning and 207.1 MB in the end (delta: 62.4 MB). Free memory was 91.4 MB in the beginning and 173.0 MB in the end (delta: -81.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 586.58 ms. Allocated memory is still 207.1 MB. Free memory was 173.0 MB in the beginning and 150.8 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] unsigned int x = 1; VAL [x=1] [L17] unsigned int y = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=1, x=1, y=1] [L19] COND FALSE !(!(y > 0)) VAL [x=1, y=1] [L21] COND FALSE !(x < y) VAL [x=1, y=1] [L29] CALL __VERIFIER_assert(x != y) VAL [\old(cond)=0] [L9] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L10] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 144 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 incorrect! Received shutdown request...