/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:54:38,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:54:38,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:54:38,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:54:38,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:54:38,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:54:38,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:54:38,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:54:38,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:54:38,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:54:38,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:54:38,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:54:38,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:54:38,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:54:38,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:54:38,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:54:38,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:54:38,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:54:38,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:54:38,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:54:38,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:54:38,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:54:38,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:54:38,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:54:38,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:54:38,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:54:38,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:54:38,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:54:38,232 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 18:54:38,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:54:38,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:54:38,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:54:38,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:54:38,258 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:54:38,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:54:38,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:54:38,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:54:38,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:54:38,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:54:38,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:54:38,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:54:38,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:54:38,260 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:54:38,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:54:38,260 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:54:38,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:54:38,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:54:38,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:54:38,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:54:38,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:54:38,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:54:38,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:54:38,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:54:38,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:54:38,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:54:38,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:54:38,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:54:38,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:54:38,263 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 -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:54:38,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:54:38,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:54:38,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:54:38,599 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:54:38,601 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:54:38,602 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-08-21 18:54:38,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2e27e837/154de9e88b5645fbaeb301066ef91add/FLAG23b53c0c2 [2020-08-21 18:54:39,183 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:54:39,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-08-21 18:54:39,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2e27e837/154de9e88b5645fbaeb301066ef91add/FLAG23b53c0c2 [2020-08-21 18:54:39,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2e27e837/154de9e88b5645fbaeb301066ef91add [2020-08-21 18:54:39,550 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:54:39,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:54:39,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:54:39,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:54:39,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:54:39,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29fb8f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39, skipping insertion in model container [2020-08-21 18:54:39,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:54:39,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:54:39,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:54:39,773 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:54:39,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:54:39,804 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:54:39,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39 WrapperNode [2020-08-21 18:54:39,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:54:39,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:54:39,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:54:39,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:54:39,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (1/1) ... [2020-08-21 18:54:39,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:54:39,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:54:39,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:54:39,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:54:39,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (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 18:54:39,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:54:39,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:54:39,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-08-21 18:54:39,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:54:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:54:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:54:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-08-21 18:54:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:54:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:54:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:54:40,191 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:54:40,191 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:54:40,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:54:40 BoogieIcfgContainer [2020-08-21 18:54:40,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:54:40,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:54:40,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:54:40,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:54:40,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:54:39" (1/3) ... [2020-08-21 18:54:40,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3b2ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:54:40, skipping insertion in model container [2020-08-21 18:54:40,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:39" (2/3) ... [2020-08-21 18:54:40,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3b2ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:54:40, skipping insertion in model container [2020-08-21 18:54:40,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:54:40" (3/3) ... [2020-08-21 18:54:40,204 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-08-21 18:54:40,215 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:54:40,226 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:54:40,242 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:54:40,272 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:54:40,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:54:40,272 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:54:40,272 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:54:40,273 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:54:40,273 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:54:40,273 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:54:40,273 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:54:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 18:54:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 18:54:40,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:40,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:40,314 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-08-21 18:54:40,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:40,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093474329] [2020-08-21 18:54:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:40,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:40,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:40,613 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 18:54:40,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093474329] [2020-08-21 18:54:40,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:54:40,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 18:54:40,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921455056] [2020-08-21 18:54:40,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:54:40,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:40,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:54:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:54:40,637 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-08-21 18:54:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:40,847 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-08-21 18:54:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:54:40,849 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-21 18:54:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:40,862 INFO L225 Difference]: With dead ends: 41 [2020-08-21 18:54:40,862 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 18:54:40,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:54:40,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 18:54:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 18:54:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 18:54:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-21 18:54:40,918 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-08-21 18:54:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:40,919 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-21 18:54:40,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:54:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-21 18:54:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:54:40,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:40,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:40,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:54:40,924 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:40,924 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-08-21 18:54:40,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:40,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262600134] [2020-08-21 18:54:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:40,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:40,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 18:54:41,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262600134] [2020-08-21 18:54:41,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:54:41,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:54:41,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074714860] [2020-08-21 18:54:41,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:54:41,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:54:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:54:41,105 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-08-21 18:54:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:41,290 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-08-21 18:54:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:54:41,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-08-21 18:54:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:41,293 INFO L225 Difference]: With dead ends: 32 [2020-08-21 18:54:41,294 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 18:54:41,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:54:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 18:54:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 18:54:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 18:54:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-08-21 18:54:41,305 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-08-21 18:54:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:41,305 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-08-21 18:54:41,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:54:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-08-21 18:54:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 18:54:41,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:41,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:41,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:54:41,308 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:41,309 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-08-21 18:54:41,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:41,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384176273] [2020-08-21 18:54:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:54:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 18:54:41,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384176273] [2020-08-21 18:54:41,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:41,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:54:41,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097695891] [2020-08-21 18:54:41,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:54:41,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:41,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:54:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:54:41,430 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2020-08-21 18:54:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:41,500 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2020-08-21 18:54:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:54:41,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 18:54:41,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:41,503 INFO L225 Difference]: With dead ends: 46 [2020-08-21 18:54:41,503 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 18:54:41,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:54:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 18:54:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 18:54:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 18:54:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-08-21 18:54:41,514 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-08-21 18:54:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:41,515 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-08-21 18:54:41,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:54:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-08-21 18:54:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 18:54:41,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:41,517 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:41,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:54:41,518 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-08-21 18:54:41,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:41,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846224775] [2020-08-21 18:54:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:54:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-21 18:54:41,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846224775] [2020-08-21 18:54:41,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:41,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:54:41,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101378744] [2020-08-21 18:54:41,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:54:41,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:41,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:54:41,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:54:41,802 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 13 states. [2020-08-21 18:54:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:42,333 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2020-08-21 18:54:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:54:42,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-08-21 18:54:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:42,338 INFO L225 Difference]: With dead ends: 54 [2020-08-21 18:54:42,339 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 18:54:42,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-08-21 18:54:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 18:54:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-08-21 18:54:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 18:54:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2020-08-21 18:54:42,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 35 [2020-08-21 18:54:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:42,359 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2020-08-21 18:54:42,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:54:42,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2020-08-21 18:54:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 18:54:42,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:42,362 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:42,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:54:42,362 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:42,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 2 times [2020-08-21 18:54:42,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:42,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057309929] [2020-08-21 18:54:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:42,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:42,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:42,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:42,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:42,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:42,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:54:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-21 18:54:42,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057309929] [2020-08-21 18:54:42,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:42,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:54:42,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714671393] [2020-08-21 18:54:42,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 18:54:42,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:42,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 18:54:42,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:54:42,671 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 14 states. [2020-08-21 18:54:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:43,275 INFO L93 Difference]: Finished difference Result 65 states and 116 transitions. [2020-08-21 18:54:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:54:43,276 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-08-21 18:54:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:43,279 INFO L225 Difference]: With dead ends: 65 [2020-08-21 18:54:43,279 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 18:54:43,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:54:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 18:54:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2020-08-21 18:54:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 18:54:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2020-08-21 18:54:43,313 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 42 [2020-08-21 18:54:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:43,313 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2020-08-21 18:54:43,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 18:54:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2020-08-21 18:54:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 18:54:43,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:43,321 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:43,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:54:43,322 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1051926487, now seen corresponding path program 3 times [2020-08-21 18:54:43,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:43,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145529415] [2020-08-21 18:54:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:54:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 18:54:43,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145529415] [2020-08-21 18:54:43,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:43,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:54:43,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147371973] [2020-08-21 18:54:43,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:54:43,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:54:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:54:43,430 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 7 states. [2020-08-21 18:54:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:43,547 INFO L93 Difference]: Finished difference Result 75 states and 128 transitions. [2020-08-21 18:54:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:54:43,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-21 18:54:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:43,549 INFO L225 Difference]: With dead ends: 75 [2020-08-21 18:54:43,549 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:54:43,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:54:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:54:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-21 18:54:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 18:54:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 74 transitions. [2020-08-21 18:54:43,562 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 74 transitions. Word has length 42 [2020-08-21 18:54:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:43,563 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 74 transitions. [2020-08-21 18:54:43,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:54:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 74 transitions. [2020-08-21 18:54:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 18:54:43,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:43,565 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:43,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:54:43,566 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:43,566 INFO L82 PathProgramCache]: Analyzing trace with hash 579008339, now seen corresponding path program 4 times [2020-08-21 18:54:43,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:43,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028588173] [2020-08-21 18:54:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:54:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-21 18:54:43,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028588173] [2020-08-21 18:54:43,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:43,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 18:54:43,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836408397] [2020-08-21 18:54:43,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:54:43,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:54:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:54:43,661 INFO L87 Difference]: Start difference. First operand 49 states and 74 transitions. Second operand 4 states. [2020-08-21 18:54:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:43,748 INFO L93 Difference]: Finished difference Result 91 states and 165 transitions. [2020-08-21 18:54:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:54:43,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-08-21 18:54:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:43,750 INFO L225 Difference]: With dead ends: 91 [2020-08-21 18:54:43,750 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 18:54:43,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 18:54:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 18:54:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-08-21 18:54:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 18:54:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2020-08-21 18:54:43,776 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 56 [2020-08-21 18:54:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:43,777 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2020-08-21 18:54:43,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:54:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2020-08-21 18:54:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 18:54:43,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:43,782 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:43,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:54:43,782 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:43,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 5 times [2020-08-21 18:54:43,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:43,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608463884] [2020-08-21 18:54:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:54:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:43,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:44,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:54:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:44,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 18:54:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:44,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:54:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-08-21 18:54:44,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608463884] [2020-08-21 18:54:44,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:54:44,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:54:44,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212861401] [2020-08-21 18:54:44,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 18:54:44,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 18:54:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:54:44,081 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand 14 states. [2020-08-21 18:54:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:44,635 INFO L93 Difference]: Finished difference Result 95 states and 184 transitions. [2020-08-21 18:54:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 18:54:44,636 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-08-21 18:54:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:44,637 INFO L225 Difference]: With dead ends: 95 [2020-08-21 18:54:44,637 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:54:44,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2020-08-21 18:54:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:54:44,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:54:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:54:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:54:44,642 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-21 18:54:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:44,643 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:54:44,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 18:54:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:54:44,643 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:54:44,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:54:44,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:54:45,085 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2020-08-21 18:54:45,143 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:54:45,144 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:54:45,144 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:54:45,144 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:54:45,144 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:54:45,145 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:54:45,145 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-08-21 18:54:45,145 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-08-21 18:54:45,145 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-08-21 18:54:45,145 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-08-21 18:54:45,146 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-08-21 18:54:45,147 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse3 (<= 3 |ackermann_#t~ret1|))) (and (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (<= 1 |ackermann_#in~m|)) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse0 .cse1 .cse2) (and .cse3 .cse0 .cse1 .cse2))) (or (= |ackermann_#in~n| 1) .cse3 (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|))))) [2020-08-21 18:54:45,147 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-08-21 18:54:45,147 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-08-21 18:54:45,148 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-08-21 18:54:45,148 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-21 18:54:45,148 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-08-21 18:54:45,149 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-08-21 18:54:45,149 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-08-21 18:54:45,149 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-08-21 18:54:45,149 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-08-21 18:54:45,149 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-08-21 18:54:45,149 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-08-21 18:54:45,150 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-08-21 18:54:45,150 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2020-08-21 18:54:45,150 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-08-21 18:54:45,150 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-08-21 18:54:45,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:54:45 BoogieIcfgContainer [2020-08-21 18:54:45,160 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:54:45,170 INFO L168 Benchmark]: Toolchain (without parser) took 5610.45 ms. Allocated memory was 138.9 MB in the beginning and 283.1 MB in the end (delta: 144.2 MB). Free memory was 102.6 MB in the beginning and 172.3 MB in the end (delta: -69.7 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:45,172 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:54:45,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.54 ms. Allocated memory is still 138.9 MB. Free memory was 102.4 MB in the beginning and 92.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:45,175 INFO L168 Benchmark]: Boogie Preprocessor took 109.66 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:45,176 INFO L168 Benchmark]: RCFGBuilder took 280.52 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 166.7 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:45,180 INFO L168 Benchmark]: TraceAbstraction took 4963.45 ms. Allocated memory was 201.3 MB in the beginning and 283.1 MB in the end (delta: 81.8 MB). Free memory was 166.7 MB in the beginning and 172.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 76.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:45,195 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 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.54 ms. Allocated memory is still 138.9 MB. Free memory was 102.4 MB in the beginning and 92.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.66 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.52 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 166.7 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4963.45 ms. Allocated memory was 201.3 MB in the beginning and 283.1 MB in the end (delta: 81.8 MB). Free memory was 166.7 MB in the beginning and 172.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 76.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 175 SDtfs, 137 SDslu, 693 SDs, 0 SdLazy, 1247 SolverSat, 216 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 125 PreInvPairs, 152 NumberOfFragments, 80 HoareAnnotationTreeSize, 125 FomulaSimplifications, 7084 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 222 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 24252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 294/369 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...