/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/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:19:58,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:19:58,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:19:58,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 22:19:58,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:19:58,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:19:58,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:19:58,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:19:58,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:19:58,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:19:58,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:19:58,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:19:58,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:19:58,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:19:58,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:19:58,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:19:58,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:19:58,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:19:58,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:19:58,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:19:58,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:19:58,278 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:19:58,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:19:58,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:19:58,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:19:58,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:19:58,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:19:58,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:19:58,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:19:58,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:19:58,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:19:58,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:19:58,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:19:58,284 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:19:58,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:19:58,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:19:58,285 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:19:58,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:19:58,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:19:58,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:19:58,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:19:58,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:19:58,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:19:58,286 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 [2020-08-22 22:19:58,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:19:58,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:19:58,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:19:58,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:19:58,651 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:19:58,652 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-08-22 22:19:58,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/003b9d1cd/c54ffe3508714e71af306b6e4f5b3c8c/FLAG2365b400b [2020-08-22 22:19:59,183 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:19:59,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-08-22 22:19:59,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/003b9d1cd/c54ffe3508714e71af306b6e4f5b3c8c/FLAG2365b400b [2020-08-22 22:19:59,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/003b9d1cd/c54ffe3508714e71af306b6e4f5b3c8c [2020-08-22 22:19:59,560 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:19:59,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:19:59,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:59,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:19:59,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:19:59,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199f7035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59, skipping insertion in model container [2020-08-22 22:19:59,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:19:59,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:19:59,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:59,752 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:19:59,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:59,782 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:19:59,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59 WrapperNode [2020-08-22 22:19:59,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:59,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:19:59,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:19:59,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:19:59,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (1/1) ... [2020-08-22 22:19:59,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:19:59,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:19:59,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:19:59,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:19:59,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:19:59,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:19:59,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:19:59,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-22 22:19:59,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:19:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:19:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-22 22:19:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:19:59,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:19:59,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:20:00,131 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:20:00,131 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 22:20:00,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:20:00 BoogieIcfgContainer [2020-08-22 22:20:00,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:20:00,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:20:00,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:20:00,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:20:00,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:19:59" (1/3) ... [2020-08-22 22:20:00,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f221e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:20:00, skipping insertion in model container [2020-08-22 22:20:00,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:59" (2/3) ... [2020-08-22 22:20:00,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f221e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:20:00, skipping insertion in model container [2020-08-22 22:20:00,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:20:00" (3/3) ... [2020-08-22 22:20:00,144 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2020-08-22 22:20:00,155 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:20:00,163 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:20:00,178 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:20:00,202 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:20:00,202 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:20:00,202 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:20:00,202 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:20:00,202 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:20:00,203 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:20:00,203 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:20:00,203 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:20:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 22:20:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 22:20:00,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:00,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:00,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:00,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1457192654, now seen corresponding path program 1 times [2020-08-22 22:20:00,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:00,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638550892] [2020-08-22 22:20:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:00,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:00,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638550892] [2020-08-22 22:20:00,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:00,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:20:00,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172167250] [2020-08-22 22:20:00,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:20:00,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:00,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:20:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:20:00,560 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 22:20:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:00,687 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-08-22 22:20:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:20:00,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-22 22:20:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:00,700 INFO L225 Difference]: With dead ends: 41 [2020-08-22 22:20:00,701 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 22:20:00,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:20:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 22:20:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-08-22 22:20:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 22:20:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-22 22:20:00,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-08-22 22:20:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:00,751 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-22 22:20:00,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:20:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-22 22:20:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 22:20:00,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:00,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:00,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:20:00,754 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:00,754 INFO L82 PathProgramCache]: Analyzing trace with hash -630240860, now seen corresponding path program 1 times [2020-08-22 22:20:00,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:00,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734368559] [2020-08-22 22:20:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:00,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:00,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734368559] [2020-08-22 22:20:00,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:00,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:20:00,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724145124] [2020-08-22 22:20:00,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:20:00,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:00,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:20:00,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:20:00,842 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-08-22 22:20:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:00,950 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-22 22:20:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:20:00,951 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-08-22 22:20:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:00,952 INFO L225 Difference]: With dead ends: 29 [2020-08-22 22:20:00,952 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 22:20:00,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:20:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 22:20:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-08-22 22:20:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 22:20:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-22 22:20:00,963 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-08-22 22:20:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:00,964 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-22 22:20:00,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:20:00,964 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-22 22:20:00,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 22:20:00,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:00,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:00,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:20:00,966 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash 656823438, now seen corresponding path program 2 times [2020-08-22 22:20:00,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:00,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394392122] [2020-08-22 22:20:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:20:00,981 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:20:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:20:00,992 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:20:01,013 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:20:01,014 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:20:01,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:20:01,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:20:01 BoogieIcfgContainer [2020-08-22 22:20:01,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:20:01,040 INFO L168 Benchmark]: Toolchain (without parser) took 1478.40 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 104.1 MB in the beginning and 122.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:20:01,042 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:20:01,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.20 ms. Allocated memory is still 139.5 MB. Free memory was 103.6 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:20:01,044 INFO L168 Benchmark]: Boogie Preprocessor took 111.01 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 181.7 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:20:01,045 INFO L168 Benchmark]: RCFGBuilder took 240.71 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 171.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:20:01,045 INFO L168 Benchmark]: TraceAbstraction took 901.36 ms. Allocated memory is still 202.9 MB. Free memory was 171.2 MB in the beginning and 122.9 MB in the end (delta: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:20:01,049 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 220.20 ms. Allocated memory is still 139.5 MB. Free memory was 103.6 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.01 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 181.7 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.71 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 171.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 901.36 ms. Allocated memory is still 202.9 MB. Free memory was 171.2 MB in the beginning and 122.9 MB in the end (delta: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i=0; VAL [i=0] [L13] COND TRUE i<5 VAL [i=0] [L14] i++ VAL [i=1] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L13] COND TRUE i<5 VAL [i=1] [L14] i++ VAL [i=2] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L13] COND TRUE i<5 VAL [i=2] [L14] i++ VAL [i=3] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=3] [L16] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 15 SDslu, 60 SDs, 0 SdLazy, 48 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 807 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/5 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...