/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:44:04,119 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-22 00:44:04,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 00:44:04,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 00:44:04,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 00:44:04,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 00:44:04,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 00:44:04,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 00:44:04,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 00:44:04,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 00:44:04,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:44:04,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:44:04,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:44:04,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:44:04,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:44:04,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:44:04,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:44:04,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:44:04,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:44:04,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:44:04,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:44:04,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:44:04,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 00:44:04,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:44:04,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:44:04,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:44:04,250 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 [2020-08-22 00:44:04,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:44:04,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:44:04,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:44:04,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:44:04,290 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:44:04,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:44:04,290 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:44:04,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:44:04,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:44:04,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:44:04,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:44:04,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:44:04,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:44:04,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:44:04,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:44:04,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:44:04,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:44:04,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:44:04,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:44:04,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:44:04,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:44:04,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:44:04,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:44:04,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:44:04,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:44:04,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:44:04,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:44:04,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:44:04,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:44:04,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:44:04,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:44:04,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:44:04,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:44:04,632 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:44:04,635 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:44:04,636 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-22 00:44:04,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e758e08a1/0528c3f5ca3446b782ee9cca80cff2ac/FLAGa263f317b [2020-08-22 00:44:05,075 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:44:05,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-22 00:44:05,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e758e08a1/0528c3f5ca3446b782ee9cca80cff2ac/FLAGa263f317b [2020-08-22 00:44:05,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e758e08a1/0528c3f5ca3446b782ee9cca80cff2ac [2020-08-22 00:44:05,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:44:05,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:44:05,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:44:05,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:44:05,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:44:05,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ecc4458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05, skipping insertion in model container [2020-08-22 00:44:05,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:44:05,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:44:05,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:44:05,691 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:44:05,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:44:05,725 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:44:05,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05 WrapperNode [2020-08-22 00:44:05,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:44:05,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:44:05,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:44:05,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:44:05,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (1/1) ... [2020-08-22 00:44:05,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:44:05,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:44:05,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:44:05,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:44:05,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (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 [2020-08-22 00:44:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:44:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:44:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 00:44:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 00:44:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:44:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:44:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 00:44:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 00:44:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 00:44:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:44:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:44:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:44:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:44:06,221 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:44:06,222 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 00:44:06,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:44:06 BoogieIcfgContainer [2020-08-22 00:44:06,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:44:06,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:44:06,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:44:06,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:44:06,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:44:05" (1/3) ... [2020-08-22 00:44:06,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f93cbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:44:06, skipping insertion in model container [2020-08-22 00:44:06,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:44:05" (2/3) ... [2020-08-22 00:44:06,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f93cbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:44:06, skipping insertion in model container [2020-08-22 00:44:06,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:44:06" (3/3) ... [2020-08-22 00:44:06,236 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-08-22 00:44:06,251 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:44:06,259 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:44:06,280 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:44:06,310 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:44:06,310 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:44:06,310 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:44:06,310 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:44:06,311 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:44:06,311 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:44:06,311 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:44:06,311 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:44:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 00:44:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 00:44:06,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:06,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:06,342 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-08-22 00:44:06,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:06,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429827492] [2020-08-22 00:44:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:06,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:44:06,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429827492] [2020-08-22 00:44:06,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:44:06,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 00:44:06,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274128906] [2020-08-22 00:44:06,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 00:44:06,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:06,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 00:44:06,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 00:44:06,541 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-08-22 00:44:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:06,566 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-08-22 00:44:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 00:44:06,568 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 00:44:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:06,577 INFO L225 Difference]: With dead ends: 61 [2020-08-22 00:44:06,578 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 00:44:06,582 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 [2020-08-22 00:44:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 00:44:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-22 00:44:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 00:44:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-08-22 00:44:06,640 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-08-22 00:44:06,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:06,641 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-08-22 00:44:06,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 00:44:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-08-22 00:44:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 00:44:06,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:06,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:06,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:44:06,643 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-08-22 00:44:06,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:06,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285094691] [2020-08-22 00:44:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:06,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:44:06,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285094691] [2020-08-22 00:44:06,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:44:06,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 00:44:06,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130625925] [2020-08-22 00:44:06,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:44:06,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:06,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:44:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:44:06,778 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-08-22 00:44:06,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:06,887 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-22 00:44:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 00:44:06,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-22 00:44:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:06,889 INFO L225 Difference]: With dead ends: 35 [2020-08-22 00:44:06,890 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 00:44:06,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:44:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 00:44:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 00:44:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 00:44:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-08-22 00:44:06,903 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-08-22 00:44:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:06,903 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-08-22 00:44:06,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:44:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-08-22 00:44:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:44:06,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:06,905 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:06,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:44:06,906 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-08-22 00:44:06,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:06,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96195937] [2020-08-22 00:44:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 00:44:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:44:07,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96195937] [2020-08-22 00:44:07,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:44:07,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 00:44:07,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506621848] [2020-08-22 00:44:07,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:44:07,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:07,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:44:07,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:44:07,038 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-08-22 00:44:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:07,199 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-22 00:44:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:44:07,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 00:44:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:07,202 INFO L225 Difference]: With dead ends: 48 [2020-08-22 00:44:07,202 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 00:44:07,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:44:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 00:44:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-22 00:44:07,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 00:44:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-22 00:44:07,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-08-22 00:44:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:07,227 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-22 00:44:07,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:44:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-22 00:44:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 00:44:07,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:07,232 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:07,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:44:07,232 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-08-22 00:44:07,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:07,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585965464] [2020-08-22 00:44:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:44:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:44:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 00:44:07,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585965464] [2020-08-22 00:44:07,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:44:07,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 00:44:07,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465015766] [2020-08-22 00:44:07,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:44:07,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:07,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:44:07,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:44:07,387 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-08-22 00:44:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:07,508 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-22 00:44:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:44:07,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-22 00:44:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:07,511 INFO L225 Difference]: With dead ends: 55 [2020-08-22 00:44:07,511 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 00:44:07,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:44:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 00:44:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-08-22 00:44:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 00:44:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-08-22 00:44:07,527 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-08-22 00:44:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:07,527 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-08-22 00:44:07,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:44:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-08-22 00:44:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 00:44:07,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:07,529 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:07,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:44:07,530 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-08-22 00:44:07,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:07,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917858256] [2020-08-22 00:44:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 00:44:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 00:44:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:44:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 00:44:07,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917858256] [2020-08-22 00:44:07,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:44:07,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 00:44:07,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56233601] [2020-08-22 00:44:07,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:44:07,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:44:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:44:07,616 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-08-22 00:44:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:07,776 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-22 00:44:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 00:44:07,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-22 00:44:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:07,778 INFO L225 Difference]: With dead ends: 70 [2020-08-22 00:44:07,779 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 00:44:07,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:44:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 00:44:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 00:44:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 00:44:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-08-22 00:44:07,794 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-08-22 00:44:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:07,794 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-08-22 00:44:07,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:44:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-08-22 00:44:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 00:44:07,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:07,796 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:07,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:44:07,803 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:07,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-08-22 00:44:07,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:07,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876026505] [2020-08-22 00:44:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:44:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:44:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 00:44:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 00:44:07,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876026505] [2020-08-22 00:44:07,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:44:07,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 00:44:07,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082352773] [2020-08-22 00:44:07,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:44:07,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:07,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:44:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:44:07,958 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-08-22 00:44:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:08,150 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-08-22 00:44:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:44:08,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-22 00:44:08,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:08,152 INFO L225 Difference]: With dead ends: 72 [2020-08-22 00:44:08,153 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 00:44:08,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:44:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 00:44:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-22 00:44:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 00:44:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-22 00:44:08,166 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-08-22 00:44:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:08,166 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-22 00:44:08,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:44:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-22 00:44:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 00:44:08,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:08,169 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:08,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:44:08,170 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-08-22 00:44:08,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:08,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425942538] [2020-08-22 00:44:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:44:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:44:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 00:44:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 00:44:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 00:44:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 00:44:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:44:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-22 00:44:08,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425942538] [2020-08-22 00:44:08,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:44:08,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:44:08,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112111897] [2020-08-22 00:44:08,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:44:08,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:44:08,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:44:08,408 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-08-22 00:44:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:08,779 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-08-22 00:44:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 00:44:08,780 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-22 00:44:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:08,782 INFO L225 Difference]: With dead ends: 96 [2020-08-22 00:44:08,783 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 00:44:08,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 00:44:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 00:44:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-08-22 00:44:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 00:44:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-08-22 00:44:08,799 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 56 [2020-08-22 00:44:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:08,799 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-08-22 00:44:08,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:44:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-08-22 00:44:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 00:44:08,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:08,801 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:08,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:44:08,802 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:08,802 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-08-22 00:44:08,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:08,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111770078] [2020-08-22 00:44:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:44:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:44:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 00:44:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 00:44:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:44:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 00:44:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:44:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-22 00:44:08,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111770078] [2020-08-22 00:44:08,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:44:08,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:44:08,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122652438] [2020-08-22 00:44:08,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:44:08,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:44:08,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:44:08,920 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-08-22 00:44:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:09,147 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-08-22 00:44:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:44:09,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-22 00:44:09,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:09,150 INFO L225 Difference]: With dead ends: 89 [2020-08-22 00:44:09,150 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 00:44:09,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:44:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 00:44:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-22 00:44:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 00:44:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-08-22 00:44:09,163 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 58 [2020-08-22 00:44:09,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:09,164 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-08-22 00:44:09,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:44:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-08-22 00:44:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 00:44:09,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:09,166 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:09,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:44:09,166 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:09,167 INFO L82 PathProgramCache]: Analyzing trace with hash 269972457, now seen corresponding path program 2 times [2020-08-22 00:44:09,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:09,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373691521] [2020-08-22 00:44:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:44:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:44:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 00:44:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 00:44:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:44:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 00:44:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:44:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 00:44:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 00:44:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 00:44:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 00:44:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-08-22 00:44:09,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373691521] [2020-08-22 00:44:09,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:44:09,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:44:09,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659812008] [2020-08-22 00:44:09,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:44:09,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:09,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:44:09,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:44:09,403 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-08-22 00:44:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:09,578 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-22 00:44:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:44:09,579 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-22 00:44:09,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:09,582 INFO L225 Difference]: With dead ends: 88 [2020-08-22 00:44:09,583 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 00:44:09,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:44:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 00:44:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-22 00:44:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 00:44:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-22 00:44:09,594 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 81 [2020-08-22 00:44:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:09,595 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-22 00:44:09,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:44:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-22 00:44:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 00:44:09,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:09,596 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:09,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:44:09,597 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:09,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:09,597 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-08-22 00:44:09,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:09,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290993603] [2020-08-22 00:44:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:44:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:44:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 00:44:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 00:44:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:44:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 00:44:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:44:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 00:44:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 00:44:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:44:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 00:44:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-22 00:44:09,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290993603] [2020-08-22 00:44:09,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:44:09,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 00:44:09,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359139076] [2020-08-22 00:44:09,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 00:44:09,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 00:44:09,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:44:09,842 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2020-08-22 00:44:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:10,157 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-22 00:44:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 00:44:10,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-22 00:44:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:10,161 INFO L225 Difference]: With dead ends: 92 [2020-08-22 00:44:10,161 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 00:44:10,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-08-22 00:44:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 00:44:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-22 00:44:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 00:44:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-08-22 00:44:10,181 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 83 [2020-08-22 00:44:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:10,181 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-08-22 00:44:10,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 00:44:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-08-22 00:44:10,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 00:44:10,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:44:10,187 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:44:10,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:44:10,187 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:44:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:44:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-08-22 00:44:10,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:44:10,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632657217] [2020-08-22 00:44:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:44:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:44:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 00:44:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:44:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 00:44:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 00:44:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:44:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 00:44:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:44:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 00:44:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 00:44:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:44:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 00:44:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 00:44:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 00:44:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 00:44:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 00:44:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:44:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-08-22 00:44:10,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632657217] [2020-08-22 00:44:10,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:44:10,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 00:44:10,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534217087] [2020-08-22 00:44:10,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 00:44:10,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:44:10,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 00:44:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:44:10,593 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 13 states. [2020-08-22 00:44:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:44:10,802 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-08-22 00:44:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:44:10,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-22 00:44:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:44:10,804 INFO L225 Difference]: With dead ends: 83 [2020-08-22 00:44:10,804 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 00:44:10,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:44:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 00:44:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 00:44:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 00:44:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 00:44:10,808 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-08-22 00:44:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:44:10,809 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 00:44:10,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 00:44:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 00:44:10,809 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 00:44:10,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 00:44:10,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 00:44:11,330 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 00:44:11,330 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:44:11,330 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:44:11,331 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 00:44:11,331 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 00:44:11,331 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 00:44:11,331 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 00:44:11,331 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 00:44:11,331 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-22 00:44:11,331 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 00:44:11,332 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-22 00:44:11,332 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-22 00:44:11,332 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-08-22 00:44:11,332 INFO L264 CegarLoopResult]: At program point L36(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-22 00:44:11,332 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-22 00:44:11,332 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-22 00:44:11,332 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-08-22 00:44:11,333 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-22 00:44:11,333 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-22 00:44:11,333 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-08-22 00:44:11,333 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-08-22 00:44:11,333 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-08-22 00:44:11,333 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-22 00:44:11,334 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-22 00:44:11,334 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-22 00:44:11,334 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-22 00:44:11,334 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-22 00:44:11,334 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-08-22 00:44:11,335 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-22 00:44:11,335 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-22 00:44:11,335 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-22 00:44:11,335 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-22 00:44:11,335 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-22 00:44:11,335 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 00:44:11,336 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-22 00:44:11,336 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-22 00:44:11,336 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-22 00:44:11,336 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-22 00:44:11,336 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-22 00:44:11,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 12:44:11 BoogieIcfgContainer [2020-08-22 00:44:11,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 00:44:11,358 INFO L168 Benchmark]: Toolchain (without parser) took 5882.39 ms. Allocated memory was 139.5 MB in the beginning and 267.9 MB in the end (delta: 128.5 MB). Free memory was 102.4 MB in the beginning and 109.1 MB in the end (delta: -6.6 MB). Peak memory consumption was 121.8 MB. Max. memory is 7.1 GB. [2020-08-22 00:44:11,359 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 00:44:11,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.45 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 00:44:11,361 INFO L168 Benchmark]: Boogie Preprocessor took 178.25 ms. Allocated memory was 139.5 MB in the beginning and 206.6 MB in the end (delta: 67.1 MB). Free memory was 92.3 MB in the beginning and 184.6 MB in the end (delta: -92.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 00:44:11,362 INFO L168 Benchmark]: RCFGBuilder took 320.58 ms. Allocated memory is still 206.6 MB. Free memory was 184.6 MB in the beginning and 169.8 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-08-22 00:44:11,363 INFO L168 Benchmark]: TraceAbstraction took 5128.07 ms. Allocated memory was 206.6 MB in the beginning and 267.9 MB in the end (delta: 61.3 MB). Free memory was 169.1 MB in the beginning and 109.1 MB in the end (delta: 60.0 MB). Peak memory consumption was 121.4 MB. Max. memory is 7.1 GB. [2020-08-22 00:44:11,370 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.45 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 178.25 ms. Allocated memory was 139.5 MB in the beginning and 206.6 MB in the end (delta: 67.1 MB). Free memory was 92.3 MB in the beginning and 184.6 MB in the end (delta: -92.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.58 ms. Allocated memory is still 206.6 MB. Free memory was 184.6 MB in the beginning and 169.8 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5128.07 ms. Allocated memory was 206.6 MB in the beginning and 267.9 MB in the end (delta: 61.3 MB). Free memory was 169.1 MB in the beginning and 109.1 MB in the end (delta: 60.0 MB). Peak memory consumption was 121.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((0 <= buf && buf < buflim + 1) && buflim + 2 <= bufferlen) && in + buflim + 3 <= buf + inlen) && bufferlen + 1 <= inlen) && 0 <= in - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 422 SDtfs, 351 SDslu, 1324 SDs, 0 SdLazy, 750 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=10, 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, 11 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 54 PreInvPairs, 91 NumberOfFragments, 206 HoareAnnotationTreeSize, 54 FomulaSimplifications, 1422 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 527 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 516 ConstructedInterpolants, 0 QuantifiedInterpolants, 111624 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1182/1281 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...