/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 --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:53:09,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:53:09,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:53:09,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 14:53:09,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:53:09,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:53:09,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:53:09,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:53:09,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:53:09,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:53:09,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:53:09,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:53:09,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:53:09,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:53:09,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:53:09,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:53:09,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:53:09,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:53:09,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:53:09,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:53:09,954 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 [2020-08-21 14:53:09,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:53:09,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:53:09,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:53:09,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:53:09,978 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:53:09,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:53:09,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:53:09,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:53:09,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:53:09,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:53:09,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:53:09,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:53:09,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:53:09,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:53:09,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:53:09,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:53:09,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:53:09,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:53:09,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:53:09,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:53:09,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:53:09,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:53:09,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:53:09,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:53:09,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:53:09,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:53:09,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:53:09,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:53:09,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:53:09,983 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:53:10,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:53:10,285 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:53:10,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:53:10,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:53:10,291 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:53:10,293 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 14:53:10,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9024c51ec/d9937eaf362642d79b088f5138996471/FLAG90cfa5146 [2020-08-21 14:53:10,865 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:53:10,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 14:53:10,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9024c51ec/d9937eaf362642d79b088f5138996471/FLAG90cfa5146 [2020-08-21 14:53:11,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9024c51ec/d9937eaf362642d79b088f5138996471 [2020-08-21 14:53:11,287 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:53:11,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:53:11,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:53:11,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:53:11,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:53:11,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aed4350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11, skipping insertion in model container [2020-08-21 14:53:11,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:53:11,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:53:11,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:53:11,486 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:53:11,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:53:11,521 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:53:11,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11 WrapperNode [2020-08-21 14:53:11,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:53:11,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:53:11,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:53:11,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:53:11,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (1/1) ... [2020-08-21 14:53:11,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:53:11,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:53:11,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:53:11,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:53:11,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (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 [2020-08-21 14:53:11,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:53:11,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:53:11,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 14:53:11,698 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:53:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:53:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 14:53:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 14:53:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:53:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:53:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:53:11,981 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:53:11,982 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:53:11,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:53:11 BoogieIcfgContainer [2020-08-21 14:53:11,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:53:11,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:53:11,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:53:11,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:53:11,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:53:11" (1/3) ... [2020-08-21 14:53:11,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f8699c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:53:11, skipping insertion in model container [2020-08-21 14:53:11,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:11" (2/3) ... [2020-08-21 14:53:11,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f8699c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:53:11, skipping insertion in model container [2020-08-21 14:53:11,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:53:11" (3/3) ... [2020-08-21 14:53:11,995 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-08-21 14:53:12,008 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:53:12,021 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:53:12,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:53:12,112 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:53:12,112 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:53:12,112 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:53:12,112 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:53:12,112 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:53:12,113 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:53:12,113 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:53:12,113 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:53:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 14:53:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 14:53:12,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:12,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:12,156 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:12,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-08-21 14:53:12,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:12,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258674539] [2020-08-21 14:53:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:12,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:53:12,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258674539] [2020-08-21 14:53:12,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:53:12,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 14:53:12,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648817808] [2020-08-21 14:53:12,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 14:53:12,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 14:53:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 14:53:12,320 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-21 14:53:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:12,346 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-08-21 14:53:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 14:53:12,347 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 14:53:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:12,356 INFO L225 Difference]: With dead ends: 38 [2020-08-21 14:53:12,357 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 14:53:12,361 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 [2020-08-21 14:53:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 14:53:12,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 14:53:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 14:53:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-08-21 14:53:12,403 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-08-21 14:53:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:12,404 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-08-21 14:53:12,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 14:53:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-08-21 14:53:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 14:53:12,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:12,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:12,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:53:12,407 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:12,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-08-21 14:53:12,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:12,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278962890] [2020-08-21 14:53:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:12,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:53:12,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278962890] [2020-08-21 14:53:12,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:53:12,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:53:12,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089872852] [2020-08-21 14:53:12,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:53:12,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:12,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:53:12,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:53:12,533 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-08-21 14:53:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:12,611 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-08-21 14:53:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:53:12,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 14:53:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:12,615 INFO L225 Difference]: With dead ends: 28 [2020-08-21 14:53:12,615 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 14:53:12,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:53:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 14:53:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-21 14:53:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 14:53:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-08-21 14:53:12,624 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-08-21 14:53:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:12,625 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-08-21 14:53:12,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:53:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-08-21 14:53:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:53:12,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:12,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:12,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:53:12,627 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-08-21 14:53:12,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:12,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703199681] [2020-08-21 14:53:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:12,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:53:12,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703199681] [2020-08-21 14:53:12,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:12,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:53:12,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932047463] [2020-08-21 14:53:12,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:53:12,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:12,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:53:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:53:12,976 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 10 states. [2020-08-21 14:53:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:13,987 INFO L93 Difference]: Finished difference Result 100 states and 182 transitions. [2020-08-21 14:53:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:53:13,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-08-21 14:53:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:13,992 INFO L225 Difference]: With dead ends: 100 [2020-08-21 14:53:13,992 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 14:53:13,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:53:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 14:53:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-08-21 14:53:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 14:53:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 138 transitions. [2020-08-21 14:53:14,020 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 138 transitions. Word has length 21 [2020-08-21 14:53:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:14,024 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 138 transitions. [2020-08-21 14:53:14,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:53:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 138 transitions. [2020-08-21 14:53:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:53:14,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:14,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:14,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:53:14,026 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:14,027 INFO L82 PathProgramCache]: Analyzing trace with hash 550117935, now seen corresponding path program 1 times [2020-08-21 14:53:14,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:14,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152489273] [2020-08-21 14:53:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:53:14,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152489273] [2020-08-21 14:53:14,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:53:14,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:53:14,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970923786] [2020-08-21 14:53:14,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:53:14,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:14,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:53:14,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:53:14,174 INFO L87 Difference]: Start difference. First operand 78 states and 138 transitions. Second operand 3 states. [2020-08-21 14:53:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:14,289 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2020-08-21 14:53:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:53:14,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:53:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:14,292 INFO L225 Difference]: With dead ends: 110 [2020-08-21 14:53:14,293 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 14:53:14,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:53:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 14:53:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-08-21 14:53:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 14:53:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-08-21 14:53:14,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-08-21 14:53:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:14,302 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-08-21 14:53:14,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:53:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-08-21 14:53:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:53:14,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:14,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:14,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:53:14,304 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-08-21 14:53:14,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:14,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731456311] [2020-08-21 14:53:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:53:14,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731456311] [2020-08-21 14:53:14,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:14,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:53:14,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396989127] [2020-08-21 14:53:14,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:53:14,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:14,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:53:14,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:53:14,571 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 13 states. [2020-08-21 14:53:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:14,740 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-21 14:53:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:53:14,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-08-21 14:53:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:14,745 INFO L225 Difference]: With dead ends: 51 [2020-08-21 14:53:14,745 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 14:53:14,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:53:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 14:53:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-21 14:53:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 14:53:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-21 14:53:14,757 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-08-21 14:53:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:14,758 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-21 14:53:14,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:53:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-21 14:53:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:53:14,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:14,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:14,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:53:14,760 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-08-21 14:53:14,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:14,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137978342] [2020-08-21 14:53:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:53:14,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137978342] [2020-08-21 14:53:14,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:53:14,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:53:14,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773892475] [2020-08-21 14:53:14,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:53:14,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:53:14,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:53:14,817 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-08-21 14:53:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:14,885 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-08-21 14:53:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:53:14,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:53:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:14,887 INFO L225 Difference]: With dead ends: 61 [2020-08-21 14:53:14,887 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 14:53:14,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:53:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 14:53:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-21 14:53:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 14:53:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-08-21 14:53:14,894 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-08-21 14:53:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:14,895 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-08-21 14:53:14,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:53:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-08-21 14:53:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:53:14,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:14,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:14,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:53:14,897 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-08-21 14:53:14,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:14,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240021671] [2020-08-21 14:53:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:53:14,929 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:53:14,929 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:53:14,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:53:14,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:53:14 BoogieIcfgContainer [2020-08-21 14:53:14,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:53:14,960 INFO L168 Benchmark]: Toolchain (without parser) took 3670.45 ms. Allocated memory was 140.5 MB in the beginning and 243.8 MB in the end (delta: 103.3 MB). Free memory was 103.5 MB in the beginning and 171.6 MB in the end (delta: -68.1 MB). Peak memory consumption was 35.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:53:14,962 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:53:14,967 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.83 ms. Allocated memory is still 140.5 MB. Free memory was 103.3 MB in the beginning and 93.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:53:14,969 INFO L168 Benchmark]: Boogie Preprocessor took 116.63 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.1 MB in the beginning and 181.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:53:14,970 INFO L168 Benchmark]: RCFGBuilder took 346.29 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 165.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:53:14,971 INFO L168 Benchmark]: TraceAbstraction took 2969.74 ms. Allocated memory was 203.4 MB in the beginning and 243.8 MB in the end (delta: 40.4 MB). Free memory was 164.7 MB in the beginning and 171.6 MB in the end (delta: -6.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:53:14,984 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.83 ms. Allocated memory is still 140.5 MB. Free memory was 103.3 MB in the beginning and 93.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.63 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.1 MB in the beginning and 181.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.29 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 165.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2969.74 ms. Allocated memory was 203.4 MB in the beginning and 243.8 MB in the end (delta: 40.4 MB). Free memory was 164.7 MB in the beginning and 171.6 MB in the end (delta: -6.9 MB). Peak memory consumption was 33.5 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] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 31 SDslu, 60 SDs, 0 SdLazy, 1106 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=3, 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, 6 MinimizatonAttempts, 28 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 7076 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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...