/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/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:46:42,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:46:42,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:46:42,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 16:46:42,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:46:42,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:46:42,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:46:42,279 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 [2020-08-22 16:46:42,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:46:42,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:46:42,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:46:42,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:46:42,331 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:46:42,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:46:42,332 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:46:42,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:46:42,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:46:42,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:46:42,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:46:42,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:46:42,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:46:42,335 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:46:42,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:46:42,335 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:46:42,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:46:42,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:46:42,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:46:42,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:46:42,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:46:42,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:46:42,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:46:42,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:46:42,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:46:42,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:46:42,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:46:42,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:46:42,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:46:42,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:46:42,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:46:42,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:46:42,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:46:42,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:46:42,663 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:46:42,667 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2020-08-22 16:46:42,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6c68ca70/f1039e0a02504ea4a4cc8fd9a516a5a3/FLAGd61111a45 [2020-08-22 16:46:43,253 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:46:43,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2020-08-22 16:46:43,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6c68ca70/f1039e0a02504ea4a4cc8fd9a516a5a3/FLAGd61111a45 [2020-08-22 16:46:43,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6c68ca70/f1039e0a02504ea4a4cc8fd9a516a5a3 [2020-08-22 16:46:43,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:46:43,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:46:43,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:46:43,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:46:43,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:46:43,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:43,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f688b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43, skipping insertion in model container [2020-08-22 16:46:43,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:43,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:46:43,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:46:43,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:46:43,836 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:46:43,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:46:43,872 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:46:43,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43 WrapperNode [2020-08-22 16:46:43,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:46:43,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:46:43,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:46:43,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:46:43,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:43,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:43,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:43,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:44,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:44,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:44,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (1/1) ... [2020-08-22 16:46:44,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:46:44,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:46:44,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:46:44,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:46:44,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (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 16:46:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:46:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:46:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:46:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:46:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:46:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:46:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:46:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:46:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:46:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:46:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:46:44,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:46:44,300 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:46:44,300 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:46:44,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:44 BoogieIcfgContainer [2020-08-22 16:46:44,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:46:44,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:46:44,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:46:44,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:46:44,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:46:43" (1/3) ... [2020-08-22 16:46:44,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3ff503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:44, skipping insertion in model container [2020-08-22 16:46:44,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:43" (2/3) ... [2020-08-22 16:46:44,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3ff503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:44, skipping insertion in model container [2020-08-22 16:46:44,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:44" (3/3) ... [2020-08-22 16:46:44,313 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-08-22 16:46:44,325 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:46:44,332 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:46:44,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:46:44,369 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:46:44,369 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:46:44,370 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:46:44,370 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:46:44,370 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:46:44,370 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:46:44,370 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:46:44,370 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:46:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-22 16:46:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:46:44,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:44,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:44,395 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-08-22 16:46:44,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:44,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601031000] [2020-08-22 16:46:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:44,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:44,736 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 16:46:44,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601031000] [2020-08-22 16:46:44,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:46:44,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 16:46:44,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844309635] [2020-08-22 16:46:44,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:46:44,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:46:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:46:44,761 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 8 states. [2020-08-22 16:46:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:44,968 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-08-22 16:46:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:46:44,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-22 16:46:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:44,985 INFO L225 Difference]: With dead ends: 29 [2020-08-22 16:46:44,985 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 16:46:44,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:46:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 16:46:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 16:46:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 16:46:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-22 16:46:45,032 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 13 [2020-08-22 16:46:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:45,033 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-22 16:46:45,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:46:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-22 16:46:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:46:45,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:45,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:45,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:46:45,035 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:45,035 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-08-22 16:46:45,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:45,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090121701] [2020-08-22 16:46:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:45,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:45,142 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 16:46:45,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090121701] [2020-08-22 16:46:45,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:46:45,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:46:45,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740346177] [2020-08-22 16:46:45,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:46:45,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:46:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:46:45,149 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-08-22 16:46:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:45,224 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2020-08-22 16:46:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:46:45,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-22 16:46:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:45,226 INFO L225 Difference]: With dead ends: 21 [2020-08-22 16:46:45,226 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 16:46:45,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:46:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 16:46:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 16:46:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 16:46:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-08-22 16:46:45,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-08-22 16:46:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:45,232 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-08-22 16:46:45,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:46:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-08-22 16:46:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:46:45,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:45,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:45,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:46:45,234 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:45,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:45,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1852956943, now seen corresponding path program 1 times [2020-08-22 16:46:45,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:45,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119299516] [2020-08-22 16:46:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:46:45,253 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:46:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:46:45,268 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:46:45,292 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:46:45,293 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:46:45,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:46:45,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:46:45 BoogieIcfgContainer [2020-08-22 16:46:45,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:46:45,328 INFO L168 Benchmark]: Toolchain (without parser) took 1710.84 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 103.6 MB in the beginning and 106.3 MB in the end (delta: -2.7 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:45,329 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:46:45,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.77 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:45,331 INFO L168 Benchmark]: Boogie Preprocessor took 132.89 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 182.4 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:45,332 INFO L168 Benchmark]: RCFGBuilder took 297.19 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 168.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:45,333 INFO L168 Benchmark]: TraceAbstraction took 1019.58 ms. Allocated memory is still 204.5 MB. Free memory was 167.5 MB in the beginning and 106.3 MB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:45,337 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.77 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.89 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 182.4 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.19 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 168.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1019.58 ms. Allocated memory is still 204.5 MB. Free memory was 167.5 MB in the beginning and 106.3 MB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] struct dummy d1, d2; [L13] int n = __VERIFIER_nondet_int(); [L14] EXPR n ? &d1 : &d2 VAL [d1={3:0}, d2={2:0}, n=0, n ? &d1 : &d2={2:0}] [L14] struct dummy *pd = n ? &d1 : &d2; [L15] COND TRUE pd == &d2 [L16] pd->a = 0 VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L20] pd == &d2 && d2.b != 0 [L20] EXPR d2.b [L20] pd == &d2 && d2.b != 0 VAL [d1={3:0}, d2={2:0}, d2.b=10, n=0, pd={2:0}, pd == &d2 && d2.b != 0=1] [L20] COND TRUE pd == &d2 && d2.b != 0 [L26] __VERIFIER_error() VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 15 SDtfs, 31 SDslu, 63 SDs, 0 SdLazy, 95 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 732 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...