/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:19:22,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:19:22,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:19:22,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-07 11:19:22,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:19:22,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:19:22,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:19:22,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:19:22,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:19:22,228 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:19:22,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:19:22,229 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:19:22,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:19:22,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:19:22,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:19:22,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:19:22,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:19:22,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:19:22,230 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:19:22,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:19:22,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:19:22,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:19:22,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:19:22,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:19:22,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:19:22,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:19:22,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:19:22,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:19:22,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:19:22,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:19:22,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:19:22,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:19:22,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:19:22,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:19:22,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:19:22,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:19:22,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:19:22,550 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:19:22,551 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:19:22,551 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:19:22,552 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-07-07 11:19:22,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a852313/11aca4cd2e324a6cbd520ec2e437c992/FLAG41a0c0f85 [2020-07-07 11:19:23,145 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:19:23,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-07-07 11:19:23,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a852313/11aca4cd2e324a6cbd520ec2e437c992/FLAG41a0c0f85 [2020-07-07 11:19:23,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a852313/11aca4cd2e324a6cbd520ec2e437c992 [2020-07-07 11:19:23,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:19:23,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:19:23,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:19:23,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:19:23,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:19:23,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3374a9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23, skipping insertion in model container [2020-07-07 11:19:23,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:19:23,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:19:23,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:19:23,725 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:19:23,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:19:23,755 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:19:23,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23 WrapperNode [2020-07-07 11:19:23,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:19:23,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:19:23,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:19:23,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:19:23,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (1/1) ... [2020-07-07 11:19:23,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:19:23,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:19:23,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:19:23,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:19:23,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (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 [2020-07-07 11:19:23,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:19:23,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:19:23,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-07 11:19:23,954 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:19:23,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:19:23,955 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-07 11:19:23,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:19:23,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:19:23,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:19:24,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:19:24,130 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:19:24,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:19:24 BoogieIcfgContainer [2020-07-07 11:19:24,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:19:24,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:19:24,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:19:24,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:19:24,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:19:23" (1/3) ... [2020-07-07 11:19:24,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de1753b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:19:24, skipping insertion in model container [2020-07-07 11:19:24,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:23" (2/3) ... [2020-07-07 11:19:24,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de1753b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:19:24, skipping insertion in model container [2020-07-07 11:19:24,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:19:24" (3/3) ... [2020-07-07 11:19:24,143 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2020-07-07 11:19:24,154 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:19:24,162 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:19:24,176 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:19:24,196 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:19:24,196 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:19:24,197 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:19:24,197 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:19:24,197 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:19:24,197 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:19:24,197 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:19:24,197 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:19:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-07 11:19:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-07-07 11:19:24,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:24,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:24,220 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash 676687463, now seen corresponding path program 1 times [2020-07-07 11:19:24,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:24,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963027377] [2020-07-07 11:19:24,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:24,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963027377] [2020-07-07 11:19:24,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:19:24,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:19:24,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343834769] [2020-07-07 11:19:24,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:19:24,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:19:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:19:24,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:19:24,451 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2020-07-07 11:19:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:19:24,539 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2020-07-07 11:19:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:19:24,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-07-07 11:19:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:19:24,550 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:19:24,550 INFO L226 Difference]: Without dead ends: 13 [2020-07-07 11:19:24,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:19:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-07 11:19:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-07-07 11:19:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-07 11:19:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-07 11:19:24,588 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-07-07 11:19:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:19:24,588 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-07 11:19:24,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:19:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-07 11:19:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-07 11:19:24,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:24,590 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:24,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:19:24,593 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1754257002, now seen corresponding path program 1 times [2020-07-07 11:19:24,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:24,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908645839] [2020-07-07 11:19:24,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:24,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908645839] [2020-07-07 11:19:24,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396891667] [2020-07-07 11:19:24,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:19:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:24,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:19:24,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:19:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:24,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:19:24,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-07 11:19:24,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132605270] [2020-07-07 11:19:24,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:19:24,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:19:24,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:19:24,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:19:24,738 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-07-07 11:19:24,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:19:24,767 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-07-07 11:19:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:19:24,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-07 11:19:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:19:24,769 INFO L225 Difference]: With dead ends: 18 [2020-07-07 11:19:24,769 INFO L226 Difference]: Without dead ends: 15 [2020-07-07 11:19:24,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:19:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-07 11:19:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-07-07 11:19:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-07 11:19:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-07 11:19:24,776 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-07-07 11:19:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:19:24,776 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-07 11:19:24,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:19:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-07 11:19:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:19:24,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:24,778 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:24,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:19:24,981 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:24,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2083501651, now seen corresponding path program 2 times [2020-07-07 11:19:24,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:24,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002764342] [2020-07-07 11:19:24,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:19:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:19:25,016 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:19:25,016 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:19:25,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:19:25,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:19:25 BoogieIcfgContainer [2020-07-07 11:19:25,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:19:25,044 INFO L168 Benchmark]: Toolchain (without parser) took 1517.16 ms. Allocated memory was 141.6 MB in the beginning and 200.8 MB in the end (delta: 59.2 MB). Free memory was 100.9 MB in the beginning and 131.0 MB in the end (delta: -30.0 MB). Peak memory consumption was 29.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:25,045 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:19:25,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.78 ms. Allocated memory is still 141.6 MB. Free memory was 100.7 MB in the beginning and 91.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:25,047 INFO L168 Benchmark]: Boogie Preprocessor took 126.39 ms. Allocated memory was 141.6 MB in the beginning and 200.8 MB in the end (delta: 59.2 MB). Free memory was 91.5 MB in the beginning and 180.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:25,048 INFO L168 Benchmark]: RCFGBuilder took 250.73 ms. Allocated memory is still 200.8 MB. Free memory was 180.0 MB in the beginning and 169.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:25,049 INFO L168 Benchmark]: TraceAbstraction took 905.10 ms. Allocated memory is still 200.8 MB. Free memory was 168.6 MB in the beginning and 131.0 MB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:25,053 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.78 ms. Allocated memory is still 141.6 MB. Free memory was 100.7 MB in the beginning and 91.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.39 ms. Allocated memory was 141.6 MB in the beginning and 200.8 MB in the end (delta: 59.2 MB). Free memory was 91.5 MB in the beginning and 180.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.73 ms. Allocated memory is still 200.8 MB. Free memory was 180.0 MB in the beginning and 169.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 905.10 ms. Allocated memory is still 200.8 MB. Free memory was 168.6 MB in the beginning and 131.0 MB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 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 [L14] i++ VAL [i=1] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L13] COND TRUE i<5 [L14] i++ VAL [i=2] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L13] COND TRUE i<5 [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, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 38 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 456 SizeOfPredicates, 1 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 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...