/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:40:51,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:40:51,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:40:51,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:40:51,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:40:51,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:40:51,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:40:51,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:40:51,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:40:51,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:40:51,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:40:51,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:40:51,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:40:51,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:40:51,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:40:51,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:40:51,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:40:51,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:40:51,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:40:51,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:40:51,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:40:51,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:40:51,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:40:51,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:40:51,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:40:51,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:40:51,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:40:51,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:40:51,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:40:51,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 16:40:51,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:40:51,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:40:51,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:40:51,197 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 16:40:51,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:40:51,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:40:51,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:40:51,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:40:51,244 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:40:51,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:40:51,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:40:51,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:40:51,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:40:51,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:40:51,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:40:51,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:40:51,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:40:51,247 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:40:51,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:40:51,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:40:51,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:40:51,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:40:51,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:40:51,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:40:51,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:40:51,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:40:51,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:40:51,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:40:51,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:40:51,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:40:51,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:40:51,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:40:51,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:40:51,250 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:40:51,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:40:51,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:40:51,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:40:51,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:40:51,574 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:40:51,575 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-21 16:40:51,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0436d37e1/80857a07ea044f40b8516245389fd1dc/FLAGa1f757473 [2020-08-21 16:40:52,132 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:40:52,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-21 16:40:52,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0436d37e1/80857a07ea044f40b8516245389fd1dc/FLAGa1f757473 [2020-08-21 16:40:52,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0436d37e1/80857a07ea044f40b8516245389fd1dc [2020-08-21 16:40:52,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:40:52,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:40:52,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:40:52,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:40:52,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:40:52,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d16da1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52, skipping insertion in model container [2020-08-21 16:40:52,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:40:52,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:40:52,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:40:52,771 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:40:52,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:40:52,799 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:40:52,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52 WrapperNode [2020-08-21 16:40:52,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:40:52,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:40:52,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:40:52,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:40:52,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (1/1) ... [2020-08-21 16:40:52,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:40:52,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:40:52,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:40:52,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:40:52,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (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 16:40:52,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:40:52,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:40:52,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:40:52,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:40:52,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:40:52,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:40:52,964 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:40:52,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:40:52,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:40:53,203 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:40:53,204 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 16:40:53,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:53 BoogieIcfgContainer [2020-08-21 16:40:53,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:40:53,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:40:53,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:40:53,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:40:53,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:40:52" (1/3) ... [2020-08-21 16:40:53,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ff4b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:53, skipping insertion in model container [2020-08-21 16:40:53,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:52" (2/3) ... [2020-08-21 16:40:53,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ff4b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:53, skipping insertion in model container [2020-08-21 16:40:53,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:53" (3/3) ... [2020-08-21 16:40:53,217 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-08-21 16:40:53,228 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:40:53,236 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:40:53,254 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:40:53,291 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:40:53,291 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:40:53,292 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:40:53,292 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:40:53,292 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:40:53,292 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:40:53,293 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:40:53,293 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:40:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 16:40:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 16:40:53,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:53,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:53,329 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-08-21 16:40:53,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:53,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766812495] [2020-08-21 16:40:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,496 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 16:40:53,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766812495] [2020-08-21 16:40:53,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:53,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 16:40:53,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443668739] [2020-08-21 16:40:53,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 16:40:53,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 16:40:53,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 16:40:53,533 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-21 16:40:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:53,570 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2020-08-21 16:40:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 16:40:53,572 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-21 16:40:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:53,582 INFO L225 Difference]: With dead ends: 49 [2020-08-21 16:40:53,583 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 16:40:53,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 16:40:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 16:40:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-21 16:40:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 16:40:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-21 16:40:53,629 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-08-21 16:40:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:53,630 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-21 16:40:53,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 16:40:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-21 16:40:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 16:40:53,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:53,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:53,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:40:53,632 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:53,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2031885466, now seen corresponding path program 1 times [2020-08-21 16:40:53,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:53,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789342186] [2020-08-21 16:40:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,738 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 16:40:53,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789342186] [2020-08-21 16:40:53,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:53,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:40:53,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035955719] [2020-08-21 16:40:53,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:40:53,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:53,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:40:53,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:40:53,743 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-08-21 16:40:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:53,777 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-21 16:40:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:40:53,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-08-21 16:40:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:53,779 INFO L225 Difference]: With dead ends: 48 [2020-08-21 16:40:53,780 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 16:40:53,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:40:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 16:40:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-08-21 16:40:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 16:40:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-21 16:40:53,789 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-08-21 16:40:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:53,790 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-21 16:40:53,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:40:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-21 16:40:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 16:40:53,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:53,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:53,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:40:53,792 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-08-21 16:40:53,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:53,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615812927] [2020-08-21 16:40:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,911 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 16:40:53,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615812927] [2020-08-21 16:40:53,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:53,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 16:40:53,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662441500] [2020-08-21 16:40:53,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:40:53,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:53,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:40:53,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:40:53,914 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-08-21 16:40:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:53,948 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-08-21 16:40:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:40:53,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-21 16:40:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:53,951 INFO L225 Difference]: With dead ends: 51 [2020-08-21 16:40:53,951 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 16:40:53,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:40:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 16:40:53,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-08-21 16:40:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 16:40:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-21 16:40:53,959 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-08-21 16:40:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:53,960 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-21 16:40:53,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:40:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-21 16:40:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:40:53,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:53,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:53,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:40:53,962 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:53,963 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-08-21 16:40:53,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:53,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054001814] [2020-08-21 16:40:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:54,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054001814] [2020-08-21 16:40:54,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:54,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 16:40:54,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063385919] [2020-08-21 16:40:54,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:40:54,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:40:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:40:54,066 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-08-21 16:40:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:54,107 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-21 16:40:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:40:54,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 16:40:54,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:54,109 INFO L225 Difference]: With dead ends: 55 [2020-08-21 16:40:54,109 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 16:40:54,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 16:40:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 16:40:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-08-21 16:40:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 16:40:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-21 16:40:54,119 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-08-21 16:40:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:54,120 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-21 16:40:54,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:40:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-21 16:40:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:40:54,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:54,121 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:54,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:40:54,122 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:54,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:54,122 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-08-21 16:40:54,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:54,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615248766] [2020-08-21 16:40:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:54,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615248766] [2020-08-21 16:40:54,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:54,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 16:40:54,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693145689] [2020-08-21 16:40:54,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:40:54,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:40:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:40:54,236 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-08-21 16:40:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:54,293 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-08-21 16:40:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:40:54,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 16:40:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:54,296 INFO L225 Difference]: With dead ends: 59 [2020-08-21 16:40:54,296 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 16:40:54,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:40:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 16:40:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-08-21 16:40:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 16:40:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-21 16:40:54,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-21 16:40:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:54,304 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-21 16:40:54,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:40:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-21 16:40:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:40:54,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:54,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:54,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:40:54,306 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 924643730, now seen corresponding path program 4 times [2020-08-21 16:40:54,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:54,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245586605] [2020-08-21 16:40:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:54,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245586605] [2020-08-21 16:40:54,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:54,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:40:54,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562653808] [2020-08-21 16:40:54,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:40:54,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:54,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:40:54,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:40:54,451 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-21 16:40:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:54,515 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-08-21 16:40:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:40:54,515 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 16:40:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:54,516 INFO L225 Difference]: With dead ends: 63 [2020-08-21 16:40:54,517 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 16:40:54,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:40:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 16:40:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-08-21 16:40:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 16:40:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-21 16:40:54,523 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-21 16:40:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:54,524 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-21 16:40:54,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:40:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-21 16:40:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 16:40:54,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:54,525 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:54,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:40:54,526 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash 157361168, now seen corresponding path program 5 times [2020-08-21 16:40:54,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:54,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435632128] [2020-08-21 16:40:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:54,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435632128] [2020-08-21 16:40:54,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:54,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:40:54,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572911144] [2020-08-21 16:40:54,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:40:54,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:40:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:40:54,720 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-21 16:40:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:54,807 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-21 16:40:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:40:54,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-21 16:40:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:54,809 INFO L225 Difference]: With dead ends: 67 [2020-08-21 16:40:54,809 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 16:40:54,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:40:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 16:40:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-21 16:40:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 16:40:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-21 16:40:54,816 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-21 16:40:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:54,817 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-21 16:40:54,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:40:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-21 16:40:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 16:40:54,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:54,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:54,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:40:54,819 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1533193998, now seen corresponding path program 6 times [2020-08-21 16:40:54,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:54,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870236365] [2020-08-21 16:40:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:54,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870236365] [2020-08-21 16:40:54,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:54,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:40:54,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769872109] [2020-08-21 16:40:54,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:40:54,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:40:54,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:40:54,957 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-21 16:40:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:55,056 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-08-21 16:40:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:40:55,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 16:40:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:55,058 INFO L225 Difference]: With dead ends: 71 [2020-08-21 16:40:55,058 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 16:40:55,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:40:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 16:40:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-08-21 16:40:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-21 16:40:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-21 16:40:55,065 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-21 16:40:55,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:55,065 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-21 16:40:55,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:40:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-21 16:40:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 16:40:55,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:55,066 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:55,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:40:55,067 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash 858616460, now seen corresponding path program 7 times [2020-08-21 16:40:55,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:55,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982696418] [2020-08-21 16:40:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:55,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:55,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982696418] [2020-08-21 16:40:55,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:55,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:40:55,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884667371] [2020-08-21 16:40:55,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:40:55,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:55,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:40:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:40:55,243 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-21 16:40:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:55,374 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-08-21 16:40:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:40:55,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-21 16:40:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:55,376 INFO L225 Difference]: With dead ends: 75 [2020-08-21 16:40:55,376 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 16:40:55,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:40:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 16:40:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-08-21 16:40:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 16:40:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-21 16:40:55,390 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-21 16:40:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:55,391 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-21 16:40:55,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:40:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-21 16:40:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 16:40:55,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:55,396 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:55,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:40:55,396 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1129664138, now seen corresponding path program 8 times [2020-08-21 16:40:55,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:55,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645570310] [2020-08-21 16:40:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:55,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:55,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645570310] [2020-08-21 16:40:55,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:55,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:40:55,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346793099] [2020-08-21 16:40:55,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:40:55,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:55,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:40:55,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:40:55,601 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-21 16:40:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:55,739 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-08-21 16:40:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:40:55,740 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 16:40:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:55,741 INFO L225 Difference]: With dead ends: 79 [2020-08-21 16:40:55,741 INFO L226 Difference]: Without dead ends: 47 [2020-08-21 16:40:55,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:40:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-21 16:40:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-08-21 16:40:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 16:40:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-21 16:40:55,753 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-21 16:40:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:55,754 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-21 16:40:55,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:40:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-21 16:40:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 16:40:55,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:55,757 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:55,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:40:55,757 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash -386522360, now seen corresponding path program 9 times [2020-08-21 16:40:55,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:55,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784628945] [2020-08-21 16:40:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:55,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:55,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784628945] [2020-08-21 16:40:55,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:55,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:40:55,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824760232] [2020-08-21 16:40:55,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:40:55,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:55,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:40:55,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:40:55,985 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-21 16:40:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:56,146 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-08-21 16:40:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:40:56,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-21 16:40:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:56,148 INFO L225 Difference]: With dead ends: 83 [2020-08-21 16:40:56,148 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 16:40:56,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:40:56,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 16:40:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-08-21 16:40:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 16:40:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-21 16:40:56,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-21 16:40:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:56,156 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-21 16:40:56,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:40:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-21 16:40:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 16:40:56,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:56,157 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:56,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:40:56,158 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:56,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1447833594, now seen corresponding path program 10 times [2020-08-21 16:40:56,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:56,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555058082] [2020-08-21 16:40:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:58,610 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 77 DAG size of output: 13 [2020-08-21 16:40:58,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:58,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555058082] [2020-08-21 16:40:58,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:58,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 16:40:58,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490514210] [2020-08-21 16:40:58,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 16:40:58,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:58,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 16:40:58,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:40:58,738 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 15 states. [2020-08-21 16:40:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:58,991 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-08-21 16:40:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:40:58,992 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-08-21 16:40:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:58,993 INFO L225 Difference]: With dead ends: 66 [2020-08-21 16:40:58,993 INFO L226 Difference]: Without dead ends: 64 [2020-08-21 16:40:58,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:40:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-21 16:40:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-08-21 16:40:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 16:40:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-08-21 16:40:59,001 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 34 [2020-08-21 16:40:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:59,001 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-08-21 16:40:59,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 16:40:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-08-21 16:40:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 16:40:59,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:59,003 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:59,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:40:59,003 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash 834286980, now seen corresponding path program 11 times [2020-08-21 16:40:59,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:59,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502309774] [2020-08-21 16:40:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:59,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:59,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502309774] [2020-08-21 16:40:59,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:59,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:40:59,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89840904] [2020-08-21 16:40:59,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:40:59,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:59,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:40:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:40:59,209 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 13 states. [2020-08-21 16:40:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:59,427 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-08-21 16:40:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:40:59,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-21 16:40:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:59,428 INFO L225 Difference]: With dead ends: 89 [2020-08-21 16:40:59,429 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:40:59,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:40:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:40:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:40:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:40:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:40:59,430 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-08-21 16:40:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:59,432 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:40:59,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:40:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:40:59,432 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:40:59,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:40:59,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:40:59,670 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-08-21 16:40:59,721 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 16:40:59,721 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:40:59,721 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:40:59,721 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 16:40:59,722 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:40:59,722 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:40:59,722 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2020-08-21 16:40:59,722 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2020-08-21 16:40:59,722 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-21 16:40:59,722 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-21 16:40:59,723 INFO L268 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-08-21 16:40:59,723 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (let ((.cse0 (div main_~v~0 4294967296))) (or (and (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= .cse0 0) (not (= main_~v~0 (let ((.cse1 (div main_~v~0 4))) (+ (* (div (+ main_~v~0 (* .cse1 (- 4))) 4294967296) 4294967296) (* .cse1 4))))) (<= 10 main_~v~0)) (and (<= main_~v~0 8) (< 0 (+ .cse0 1))))) [2020-08-21 16:40:59,723 INFO L264 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (and (<= (div main_~v~0 4294967296) 0) (not (= main_~v~0 (let ((.cse0 (div main_~v~0 4))) (+ (* 4294967296 (div (+ main_~v~0 (* .cse0 (- 4))) 4294967296)) (* 4 .cse0))))) (<= 10 main_~v~0)) [2020-08-21 16:40:59,723 INFO L268 CegarLoopResult]: For program point L17-2(lines 17 23) no Hoare annotation was computed. [2020-08-21 16:40:59,723 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-21 16:40:59,724 INFO L268 CegarLoopResult]: For program point L17-4(lines 17 23) no Hoare annotation was computed. [2020-08-21 16:40:59,724 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2020-08-21 16:40:59,724 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-08-21 16:40:59,724 INFO L268 CegarLoopResult]: For program point L22(lines 20 23) no Hoare annotation was computed. [2020-08-21 16:40:59,724 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 23) no Hoare annotation was computed. [2020-08-21 16:40:59,724 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-21 16:40:59,724 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 16:40:59,724 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 16:40:59,725 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 16:40:59,725 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 16:40:59,726 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 16:40:59,726 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 16:40:59,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:40:59 BoogieIcfgContainer [2020-08-21 16:40:59,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:40:59,765 INFO L168 Benchmark]: Toolchain (without parser) took 7250.93 ms. Allocated memory was 139.5 MB in the beginning and 247.5 MB in the end (delta: 108.0 MB). Free memory was 101.2 MB in the beginning and 120.2 MB in the end (delta: -19.0 MB). Peak memory consumption was 89.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:40:59,766 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-21 16:40:59,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.59 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 91.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:40:59,768 INFO L168 Benchmark]: Boogie Preprocessor took 108.13 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.3 MB in the beginning and 180.3 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:40:59,775 INFO L168 Benchmark]: RCFGBuilder took 299.92 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 165.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:40:59,781 INFO L168 Benchmark]: TraceAbstraction took 6551.24 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 165.7 MB in the beginning and 120.2 MB in the end (delta: 45.4 MB). Peak memory consumption was 91.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:40:59,786 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.59 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 91.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.13 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.3 MB in the beginning and 180.3 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.92 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 165.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6551.24 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 165.7 MB in the beginning and 120.2 MB in the end (delta: 45.4 MB). Peak memory consumption was 91.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((v <= 9 && 9 <= v) || ((v / 4294967296 <= 0 && !(v == (v + v / 4 * -4) / 4294967296 * 4294967296 + v / 4 * 4)) && 10 <= v)) || (v <= 8 && 0 < v / 4294967296 + 1) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 216 SDslu, 1651 SDs, 0 SdLazy, 1279 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=12, 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, 13 MinimizatonAttempts, 96 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 44 NumberOfFragments, 150 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 314 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 301 ConstructedInterpolants, 0 QuantifiedInterpolants, 33605 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 21/506 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...