/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:27:05,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:27:05,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:27:05,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:27:05,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:27:05,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:27:05,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:27:05,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:27:05,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:27:05,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:27:05,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:27:05,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:27:05,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:27:05,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:27:05,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:27:05,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:27:05,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:27:05,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:27:05,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:27:05,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:27:05,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:27:05,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:27:05,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:27:05,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:27:05,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 13:27:05,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:27:05,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:27:05,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:27:05,132 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 13:27:05,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:27:05,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:27:05,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:27:05,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:27:05,178 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:27:05,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:27:05,179 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:27:05,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:27:05,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:27:05,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:27:05,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:27:05,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:27:05,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:27:05,180 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:27:05,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:27:05,180 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:27:05,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:27:05,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:27:05,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:27:05,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:27:05,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:27:05,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:27:05,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:27:05,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:27:05,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:27:05,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:27:05,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:27:05,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:27:05,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:27:05,186 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 -> false [2020-08-21 13:27:05,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:27:05,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:27:05,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:27:05,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:27:05,503 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:27:05,504 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-08-21 13:27:05,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdfc07b2d/4ec9a213ca19491c850560cd830bf55a/FLAG4eda0ddb3 [2020-08-21 13:27:06,011 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:27:06,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-08-21 13:27:06,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdfc07b2d/4ec9a213ca19491c850560cd830bf55a/FLAG4eda0ddb3 [2020-08-21 13:27:06,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdfc07b2d/4ec9a213ca19491c850560cd830bf55a [2020-08-21 13:27:06,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:27:06,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:27:06,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:27:06,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:27:06,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:27:06,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a37269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06, skipping insertion in model container [2020-08-21 13:27:06,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:27:06,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:27:06,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:27:06,639 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:27:06,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:27:06,667 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:27:06,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06 WrapperNode [2020-08-21 13:27:06,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:27:06,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:27:06,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:27:06,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:27:06,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (1/1) ... [2020-08-21 13:27:06,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:27:06,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:27:06,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:27:06,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:27:06,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (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 13:27:06,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:27:06,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:27:06,844 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 13:27:06,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:27:06,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:27:06,846 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 13:27:06,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 13:27:06,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 13:27:06,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:27:06,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:27:06,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:27:06,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:27:07,025 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:27:07,025 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:27:07,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:27:07 BoogieIcfgContainer [2020-08-21 13:27:07,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:27:07,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:27:07,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:27:07,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:27:07,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:27:06" (1/3) ... [2020-08-21 13:27:07,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d24b396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:27:07, skipping insertion in model container [2020-08-21 13:27:07,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:27:06" (2/3) ... [2020-08-21 13:27:07,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d24b396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:27:07, skipping insertion in model container [2020-08-21 13:27:07,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:27:07" (3/3) ... [2020-08-21 13:27:07,037 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2020-08-21 13:27:07,045 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:27:07,052 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:27:07,066 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:27:07,090 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:27:07,090 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:27:07,090 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:27:07,090 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:27:07,090 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:27:07,091 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:27:07,091 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:27:07,091 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:27:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-08-21 13:27:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 13:27:07,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:07,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:07,111 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1330899215, now seen corresponding path program 1 times [2020-08-21 13:27:07,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:07,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138454167] [2020-08-21 13:27:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:07,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:07,300 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 13:27:07,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138454167] [2020-08-21 13:27:07,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:27:07,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:27:07,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563429932] [2020-08-21 13:27:07,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:27:07,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:07,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:27:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:27:07,365 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-08-21 13:27:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:07,454 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-08-21 13:27:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:27:07,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-08-21 13:27:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:07,467 INFO L225 Difference]: With dead ends: 26 [2020-08-21 13:27:07,468 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 13:27:07,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:27:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 13:27:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 13:27:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 13:27:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-21 13:27:07,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-21 13:27:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:07,512 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-21 13:27:07,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:27:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-21 13:27:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 13:27:07,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:07,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:07,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:27:07,514 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:07,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:07,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1691859760, now seen corresponding path program 1 times [2020-08-21 13:27:07,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:07,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164251034] [2020-08-21 13:27:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:07,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:07,650 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 13:27:07,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164251034] [2020-08-21 13:27:07,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:27:07,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:27:07,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511478062] [2020-08-21 13:27:07,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:27:07,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:27:07,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:27:07,655 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-08-21 13:27:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:07,755 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-08-21 13:27:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:27:07,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-08-21 13:27:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:07,758 INFO L225 Difference]: With dead ends: 17 [2020-08-21 13:27:07,758 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 13:27:07,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:27:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 13:27:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 13:27:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 13:27:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-21 13:27:07,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-21 13:27:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:07,771 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-21 13:27:07,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:27:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-21 13:27:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:27:07,773 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:07,774 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:07,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:27:07,775 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash -908107473, now seen corresponding path program 2 times [2020-08-21 13:27:07,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:07,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001803318] [2020-08-21 13:27:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:07,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:27:07,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001803318] [2020-08-21 13:27:07,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:27:07,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:27:07,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117983666] [2020-08-21 13:27:07,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:27:07,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:27:07,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:27:07,936 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-08-21 13:27:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:08,039 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-08-21 13:27:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:27:08,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-21 13:27:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:08,041 INFO L225 Difference]: With dead ends: 18 [2020-08-21 13:27:08,041 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 13:27:08,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:27:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 13:27:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 13:27:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 13:27:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-21 13:27:08,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-08-21 13:27:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:08,048 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-21 13:27:08,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:27:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-21 13:27:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 13:27:08,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:08,050 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:08,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:27:08,050 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1913376944, now seen corresponding path program 3 times [2020-08-21 13:27:08,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:08,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102900582] [2020-08-21 13:27:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:08,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:27:08,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102900582] [2020-08-21 13:27:08,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:27:08,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:27:08,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448838867] [2020-08-21 13:27:08,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:27:08,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:08,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:27:08,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:27:08,140 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-08-21 13:27:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:08,293 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-21 13:27:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:27:08,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-08-21 13:27:08,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:08,295 INFO L225 Difference]: With dead ends: 19 [2020-08-21 13:27:08,295 INFO L226 Difference]: Without dead ends: 16 [2020-08-21 13:27:08,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:27:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-21 13:27:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-21 13:27:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 13:27:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-21 13:27:08,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-08-21 13:27:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:08,301 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-21 13:27:08,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:27:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-21 13:27:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 13:27:08,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:27:08,302 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:27:08,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:27:08,303 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:27:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:27:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash -814919345, now seen corresponding path program 4 times [2020-08-21 13:27:08,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:27:08,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795154196] [2020-08-21 13:27:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:27:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:08,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:27:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:27:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 13:27:08,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795154196] [2020-08-21 13:27:08,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:27:08,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:27:08,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065996242] [2020-08-21 13:27:08,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:27:08,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:27:08,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:27:08,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:27:08,356 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-08-21 13:27:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:27:08,400 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-08-21 13:27:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:27:08,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-21 13:27:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:27:08,401 INFO L225 Difference]: With dead ends: 16 [2020-08-21 13:27:08,401 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:27:08,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:27:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:27:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:27:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:27:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:27:08,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-08-21 13:27:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:27:08,403 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:27:08,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:27:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:27:08,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:27:08,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:27:08,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:27:08,466 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:27:08,466 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_65~0 |old(~__return_65~0)|)) [2020-08-21 13:27:08,467 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:27:08,467 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:27:08,467 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:27:08,467 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:27:08,467 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:27:08,467 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-08-21 13:27:08,467 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 13:27:08,468 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-08-21 13:27:08,468 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-08-21 13:27:08,468 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-08-21 13:27:08,468 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2020-08-21 13:27:08,468 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-08-21 13:27:08,468 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-08-21 13:27:08,469 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-08-21 13:27:08,469 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-08-21 13:27:08,469 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-08-21 13:27:08,469 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-08-21 13:27:08,469 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2020-08-21 13:27:08,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:27:08 BoogieIcfgContainer [2020-08-21 13:27:08,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:27:08,497 INFO L168 Benchmark]: Toolchain (without parser) took 2103.60 ms. Allocated memory was 137.9 MB in the beginning and 231.7 MB in the end (delta: 93.8 MB). Free memory was 101.8 MB in the beginning and 176.3 MB in the end (delta: -74.6 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:08,502 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-21 13:27:08,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.50 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 91.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:08,512 INFO L168 Benchmark]: Boogie Preprocessor took 107.96 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.6 MB in the beginning and 180.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:08,514 INFO L168 Benchmark]: RCFGBuilder took 252.56 ms. Allocated memory is still 201.3 MB. Free memory was 180.1 MB in the beginning and 167.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:08,515 INFO L168 Benchmark]: TraceAbstraction took 1461.71 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 166.9 MB in the beginning and 176.3 MB in the end (delta: -9.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-08-21 13:27:08,524 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.50 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 91.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.96 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.6 MB in the beginning and 180.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.56 ms. Allocated memory is still 201.3 MB. Free memory was 180.1 MB in the beginning and 167.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1461.71 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 166.9 MB in the beginning and 176.3 MB in the end (delta: -9.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: 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: 28]: Loop Invariant Derived loop invariant: (\old(__return_65) == __return_65 && main__x + 50 <= 0) || (\old(__return_65) == __return_65 && main__x + 2 <= main__y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 46 SDslu, 89 SDs, 0 SdLazy, 133 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 9 NumberOfFragments, 31 HoareAnnotationTreeSize, 5 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 2220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 10/20 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...