/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:25:38,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:25:38,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:25:38,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:25:38,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:25:38,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:25:38,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:25:38,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:25:38,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:25:38,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:25:38,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:25:38,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:25:38,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:25:38,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:25:38,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:25:38,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:25:38,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:25:38,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:25:39,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:25:39,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:25:39,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:25:39,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:25:39,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:25:39,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:25:39,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:25:39,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:25:39,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:25:39,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:25:39,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:25:39,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:25:39,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:25:39,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:25:39,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:25:39,076 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:25:39,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:25:39,076 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:25:39,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:25:39,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:25:39,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:25:39,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:25:39,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:25:39,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:25:39,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:25:39,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:25:39,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:25:39,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:25:39,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:25:39,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:25:39,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:25:39,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:25:39,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:25:39,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:25:39,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:25:39,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:25:39,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:25:39,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:25:39,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:25:39,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:25:39,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:25:39,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:25:39,399 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:25:39,405 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:25:39,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:25:39,407 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:25:39,408 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2020-08-18 16:25:39,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e76a9f99/908a87bef6584ac7b7d9f6dfafadb06b/FLAG00a12f236 [2020-08-18 16:25:39,984 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:25:39,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invariants/eq1.c [2020-08-18 16:25:39,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e76a9f99/908a87bef6584ac7b7d9f6dfafadb06b/FLAG00a12f236 [2020-08-18 16:25:40,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e76a9f99/908a87bef6584ac7b7d9f6dfafadb06b [2020-08-18 16:25:40,339 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:25:40,341 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:25:40,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:25:40,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:25:40,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:25:40,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d1dceb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40, skipping insertion in model container [2020-08-18 16:25:40,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:25:40,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:25:40,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:25:40,563 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:25:40,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:25:40,596 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:25:40,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40 WrapperNode [2020-08-18 16:25:40,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:25:40,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:25:40,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:25:40,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:25:40,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (1/1) ... [2020-08-18 16:25:40,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:25:40,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:25:40,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:25:40,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:25:40,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:25:40,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:25:40,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:25:40,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 16:25:40,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:25:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:25:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 16:25:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 16:25:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:25:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:25:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:25:40,957 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:25:40,957 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 16:25:40,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:25:40 BoogieIcfgContainer [2020-08-18 16:25:40,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:25:40,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:25:40,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:25:40,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:25:40,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:25:40" (1/3) ... [2020-08-18 16:25:40,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c96f36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:25:40, skipping insertion in model container [2020-08-18 16:25:40,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:40" (2/3) ... [2020-08-18 16:25:40,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c96f36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:25:40, skipping insertion in model container [2020-08-18 16:25:40,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:25:40" (3/3) ... [2020-08-18 16:25:40,969 INFO L109 eAbstractionObserver]: Analyzing ICFG eq1.c [2020-08-18 16:25:40,980 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:25:40,988 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:25:41,002 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:25:41,024 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:25:41,024 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:25:41,024 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:25:41,024 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:25:41,024 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:25:41,024 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:25:41,025 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:25:41,025 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:25:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 16:25:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 16:25:41,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:25:41,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:25:41,049 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:25:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:25:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-08-18 16:25:41,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:25:41,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774018733] [2020-08-18 16:25:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:25:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:41,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:25:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:25:41,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774018733] [2020-08-18 16:25:41,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:25:41,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 16:25:41,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702942964] [2020-08-18 16:25:41,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 16:25:41,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:25:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 16:25:41,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 16:25:41,195 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-18 16:25:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:25:41,221 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-18 16:25:41,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 16:25:41,223 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 16:25:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:25:41,232 INFO L225 Difference]: With dead ends: 31 [2020-08-18 16:25:41,232 INFO L226 Difference]: Without dead ends: 12 [2020-08-18 16:25:41,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 16:25:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-18 16:25:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-18 16:25:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-18 16:25:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-08-18 16:25:41,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-08-18 16:25:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:25:41,275 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-08-18 16:25:41,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 16:25:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-08-18 16:25:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 16:25:41,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:25:41,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:25:41,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:25:41,278 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:25:41,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:25:41,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2020-08-18 16:25:41,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:25:41,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436673755] [2020-08-18 16:25:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:25:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:41,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:25:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:25:41,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436673755] [2020-08-18 16:25:41,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:25:41,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:25:41,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464183868] [2020-08-18 16:25:41,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:25:41,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:25:41,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:25:41,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:25:41,493 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-08-18 16:25:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:25:41,530 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-08-18 16:25:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:25:41,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 16:25:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:25:41,531 INFO L225 Difference]: With dead ends: 12 [2020-08-18 16:25:41,531 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:25:41,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:25:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:25:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:25:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:25:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:25:41,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-08-18 16:25:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:25:41,534 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:25:41,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:25:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:25:41,534 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:25:41,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:25:41,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:25:41,582 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 16:25:41,582 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:25:41,583 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:25:41,583 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 16:25:41,583 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:25:41,583 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:25:41,583 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: true [2020-08-18 16:25:41,584 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-08-18 16:25:41,584 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-18 16:25:41,584 INFO L268 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2020-08-18 16:25:41,585 INFO L264 CegarLoopResult]: At program point L15-2(lines 14 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-18 16:25:41,585 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-08-18 16:25:41,585 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-18 16:25:41,586 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-18 16:25:41,586 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-18 16:25:41,586 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 16:25:41,586 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-18 16:25:41,587 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-18 16:25:41,587 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-18 16:25:41,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:25:41 BoogieIcfgContainer [2020-08-18 16:25:41,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:25:41,612 INFO L168 Benchmark]: Toolchain (without parser) took 1269.53 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 104.2 MB in the beginning and 134.5 MB in the end (delta: -30.3 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:25:41,613 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:25:41,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.26 ms. Allocated memory is still 147.8 MB. Free memory was 104.0 MB in the beginning and 94.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:25:41,615 INFO L168 Benchmark]: Boogie Preprocessor took 115.97 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 94.0 MB in the beginning and 182.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:25:41,616 INFO L168 Benchmark]: RCFGBuilder took 246.90 ms. Allocated memory is still 203.9 MB. Free memory was 182.3 MB in the beginning and 170.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:25:41,617 INFO L168 Benchmark]: TraceAbstraction took 646.19 ms. Allocated memory is still 203.9 MB. Free memory was 170.1 MB in the beginning and 134.5 MB in the end (delta: 35.6 MB). Peak memory consumption was 35.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:25:41,621 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.26 ms. Allocated memory is still 147.8 MB. Free memory was 104.0 MB in the beginning and 94.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.97 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 94.0 MB in the beginning and 182.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 246.90 ms. Allocated memory is still 203.9 MB. Free memory was 182.3 MB in the beginning and 170.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 646.19 ms. Allocated memory is still 203.9 MB. Free memory was 170.1 MB in the beginning and 134.5 MB in the end (delta: 35.6 MB). Peak memory consumption was 35.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: x == w && z == y - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 2 SDslu, 20 SDs, 0 SdLazy, 8 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...