/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=0.8 --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 01:33:21,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:33:21,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:33:21,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:33:21,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:33:21,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:33:21,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:33:21,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:33:21,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:33:21,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:33:21,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:33:21,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:33:21,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:33:21,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:33:21,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:33:21,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:33:21,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:33:21,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:33:21,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:33:21,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:33:21,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:33:21,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:33:21,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:33:21,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:33:21,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:33:21,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:33:21,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:33:21,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:33:21,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:33:21,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 01:33:21,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 01:33:21,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 01:33:21,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 01:33:21,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 01:33:21,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 01:33:21,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 01:33:21,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 01:33:21,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 01:33:21,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:33:21,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:33:21,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:33:21,473 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 01:33:21,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:33:21,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:33:21,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:33:21,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:33:21,517 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:33:21,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:33:21,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:33:21,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:33:21,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:33:21,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:33:21,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:33:21,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:33:21,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:33:21,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:33:21,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:33:21,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:33:21,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:33:21,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:33:21,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:33:21,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:33:21,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:33:21,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:33:21,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:33:21,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:33:21,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:33:21,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:33:21,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:33:21,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:33:21,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:33:21,523 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=0.8;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=0.8;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=0.8;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=0.8;log-additional-information=true; [2020-08-22 01:33:21,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:33:21,865 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:33:21,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:33:21,874 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:33:21,875 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:33:21,876 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-22 01:33:21,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8eae450da/950e8790e5b54bc9a0b5c9037411f8ef/FLAG2b76160eb [2020-08-22 01:33:22,387 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:33:22,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-22 01:33:22,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8eae450da/950e8790e5b54bc9a0b5c9037411f8ef/FLAG2b76160eb [2020-08-22 01:33:22,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8eae450da/950e8790e5b54bc9a0b5c9037411f8ef [2020-08-22 01:33:22,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:33:22,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:33:22,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:33:22,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:33:22,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:33:22,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:33:22" (1/1) ... [2020-08-22 01:33:22,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200f4d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:22, skipping insertion in model container [2020-08-22 01:33:22,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:33:22" (1/1) ... [2020-08-22 01:33:22,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:33:22,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:33:23,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:33:23,045 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:33:23,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:33:23,086 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:33:23,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23 WrapperNode [2020-08-22 01:33:23,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:33:23,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:33:23,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:33:23,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:33:23,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (1/1) ... [2020-08-22 01:33:23,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (1/1) ... [2020-08-22 01:33:23,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (1/1) ... [2020-08-22 01:33:23,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (1/1) ... [2020-08-22 01:33:23,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (1/1) ... [2020-08-22 01:33:23,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (1/1) ... [2020-08-22 01:33:23,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (1/1) ... [2020-08-22 01:33:23,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:33:23,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:33:23,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:33:23,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:33:23,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (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 01:33:23,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:33:23,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:33:23,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 01:33:23,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 01:33:23,275 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:33:23,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:33:23,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 01:33:23,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 01:33:23,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:33:23,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:33:23,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:33:23,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:33:23,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:33:23,565 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:33:23,565 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 01:33:23,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:33:23 BoogieIcfgContainer [2020-08-22 01:33:23,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:33:23,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:33:23,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:33:23,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:33:23,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:33:22" (1/3) ... [2020-08-22 01:33:23,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f0c4654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:33:23, skipping insertion in model container [2020-08-22 01:33:23,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:23" (2/3) ... [2020-08-22 01:33:23,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f0c4654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:33:23, skipping insertion in model container [2020-08-22 01:33:23,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:33:23" (3/3) ... [2020-08-22 01:33:23,577 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-08-22 01:33:23,587 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:33:23,593 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:33:23,606 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:33:23,630 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:33:23,630 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:33:23,630 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:33:23,631 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:33:23,631 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:33:23,631 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:33:23,631 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:33:23,631 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:33:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 01:33:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 01:33:23,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:23,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:23,655 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-08-22 01:33:23,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:23,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651786455] [2020-08-22 01:33:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:23,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:23,804 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 01:33:23,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651786455] [2020-08-22 01:33:23,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:33:23,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 01:33:23,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722372272] [2020-08-22 01:33:23,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 01:33:23,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:23,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 01:33:23,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 01:33:23,831 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-08-22 01:33:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:23,861 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-08-22 01:33:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 01:33:23,862 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 01:33:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:23,873 INFO L225 Difference]: With dead ends: 61 [2020-08-22 01:33:23,873 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 01:33:23,877 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 01:33:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 01:33:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-22 01:33:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 01:33:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-08-22 01:33:23,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-08-22 01:33:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:23,924 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-08-22 01:33:23,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 01:33:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-08-22 01:33:23,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 01:33:23,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:23,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:23,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:33:23,926 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:23,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:23,927 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-08-22 01:33:23,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:23,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773398563] [2020-08-22 01:33:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,082 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 01:33:24,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773398563] [2020-08-22 01:33:24,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:33:24,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:33:24,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211099942] [2020-08-22 01:33:24,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:33:24,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:24,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:33:24,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:33:24,087 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-08-22 01:33:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:24,176 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-22 01:33:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:33:24,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-22 01:33:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:24,178 INFO L225 Difference]: With dead ends: 35 [2020-08-22 01:33:24,179 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 01:33:24,180 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 01:33:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 01:33:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 01:33:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 01:33:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-08-22 01:33:24,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-08-22 01:33:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:24,193 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-08-22 01:33:24,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:33:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-08-22 01:33:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:33:24,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:24,194 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 01:33:24,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:33:24,195 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-08-22 01:33:24,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:24,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307296488] [2020-08-22 01:33:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 01:33:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,316 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 01:33:24,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307296488] [2020-08-22 01:33:24,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:33:24,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:33:24,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599143142] [2020-08-22 01:33:24,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:33:24,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:33:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:33:24,319 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-08-22 01:33:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:24,471 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-22 01:33:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:33:24,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 01:33:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:24,473 INFO L225 Difference]: With dead ends: 48 [2020-08-22 01:33:24,474 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:33:24,474 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 01:33:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:33:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-22 01:33:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 01:33:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-22 01:33:24,490 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-08-22 01:33:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:24,490 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-22 01:33:24,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:33:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-22 01:33:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:33:24,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:24,492 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 01:33:24,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:33:24,493 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-08-22 01:33:24,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:24,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133383190] [2020-08-22 01:33:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:33:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 01:33:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,581 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 01:33:24,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133383190] [2020-08-22 01:33:24,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:33:24,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:33:24,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588049720] [2020-08-22 01:33:24,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:33:24,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:24,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:33:24,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:33:24,584 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-08-22 01:33:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:24,697 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-22 01:33:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:33:24,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-22 01:33:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:24,699 INFO L225 Difference]: With dead ends: 55 [2020-08-22 01:33:24,699 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 01:33:24,700 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 01:33:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 01:33:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-08-22 01:33:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:33:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-08-22 01:33:24,712 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-08-22 01:33:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:24,713 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-08-22 01:33:24,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:33:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-08-22 01:33:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:33:24,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:24,715 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 01:33:24,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:33:24,715 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:24,716 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-08-22 01:33:24,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:24,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535018777] [2020-08-22 01:33:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 01:33:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 01:33:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 01:33:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,801 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 01:33:24,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535018777] [2020-08-22 01:33:24,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:33:24,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 01:33:24,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667448514] [2020-08-22 01:33:24,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:33:24,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:33:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:33:24,804 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-08-22 01:33:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:24,987 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-22 01:33:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:33:24,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-22 01:33:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:24,989 INFO L225 Difference]: With dead ends: 70 [2020-08-22 01:33:24,989 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 01:33:24,990 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 01:33:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 01:33:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 01:33:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 01:33:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-08-22 01:33:25,003 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-08-22 01:33:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:25,003 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-08-22 01:33:25,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:33:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-08-22 01:33:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 01:33:25,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:25,005 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 01:33:25,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:33:25,005 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-08-22 01:33:25,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:25,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88190316] [2020-08-22 01:33:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:33:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 01:33:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 01:33:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,133 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 01:33:25,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88190316] [2020-08-22 01:33:25,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:33:25,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:33:25,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204104011] [2020-08-22 01:33:25,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:33:25,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:33:25,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:33:25,138 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-08-22 01:33:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:25,335 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-08-22 01:33:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:33:25,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-22 01:33:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:25,338 INFO L225 Difference]: With dead ends: 72 [2020-08-22 01:33:25,338 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 01:33:25,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:33:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 01:33:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-22 01:33:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 01:33:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-22 01:33:25,366 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-08-22 01:33:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:25,368 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-22 01:33:25,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:33:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-22 01:33:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 01:33:25,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:25,372 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 01:33:25,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:33:25,372 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-08-22 01:33:25,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:25,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927639456] [2020-08-22 01:33:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:33:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 01:33:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 01:33:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:33:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 01:33:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 01:33:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 01:33:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,579 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 01:33:25,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927639456] [2020-08-22 01:33:25,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:25,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:33:25,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081444350] [2020-08-22 01:33:25,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:33:25,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:25,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:33:25,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:33:25,582 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-08-22 01:33:25,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:25,912 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-08-22 01:33:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:33:25,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-22 01:33:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:25,915 INFO L225 Difference]: With dead ends: 96 [2020-08-22 01:33:25,915 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 01:33:25,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:33:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 01:33:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-08-22 01:33:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 01:33:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-08-22 01:33:25,929 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 56 [2020-08-22 01:33:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:25,930 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-08-22 01:33:25,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:33:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-08-22 01:33:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:33:25,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:25,932 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 01:33:25,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:33:25,932 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-08-22 01:33:25,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:25,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131883688] [2020-08-22 01:33:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:33:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 01:33:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 01:33:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:33:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:33:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:33:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:33:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,038 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 01:33:26,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131883688] [2020-08-22 01:33:26,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:26,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:33:26,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991247613] [2020-08-22 01:33:26,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:33:26,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:33:26,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:33:26,041 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-08-22 01:33:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:26,248 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-08-22 01:33:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:33:26,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-22 01:33:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:26,251 INFO L225 Difference]: With dead ends: 89 [2020-08-22 01:33:26,251 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 01:33:26,252 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 01:33:26,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 01:33:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-22 01:33:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 01:33:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-08-22 01:33:26,280 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 58 [2020-08-22 01:33:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:26,280 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-08-22 01:33:26,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:33:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-08-22 01:33:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 01:33:26,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:26,284 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 01:33:26,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:33:26,285 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash 269972457, now seen corresponding path program 2 times [2020-08-22 01:33:26,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:26,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264090564] [2020-08-22 01:33:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:33:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 01:33:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 01:33:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:33:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:33:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:33:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:33:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 01:33:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:33:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 01:33:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 01:33:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,472 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 01:33:26,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264090564] [2020-08-22 01:33:26,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:26,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:33:26,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568374181] [2020-08-22 01:33:26,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:33:26,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:33:26,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:33:26,475 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-08-22 01:33:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:26,629 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-22 01:33:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:33:26,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-22 01:33:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:26,633 INFO L225 Difference]: With dead ends: 88 [2020-08-22 01:33:26,633 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 01:33:26,634 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 01:33:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 01:33:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-22 01:33:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 01:33:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-22 01:33:26,642 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 81 [2020-08-22 01:33:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:26,646 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-22 01:33:26,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:33:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-22 01:33:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 01:33:26,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:26,647 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 01:33:26,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:33:26,648 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:26,648 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-08-22 01:33:26,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:26,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309959466] [2020-08-22 01:33:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:33:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 01:33:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 01:33:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:33:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:33:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:33:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:33:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 01:33:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 01:33:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:33:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 01:33:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:26,814 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 01:33:26,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309959466] [2020-08-22 01:33:26,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:26,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:33:26,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379348339] [2020-08-22 01:33:26,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:33:26,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:33:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:33:26,817 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2020-08-22 01:33:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:27,091 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-22 01:33:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:33:27,092 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-22 01:33:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:27,094 INFO L225 Difference]: With dead ends: 92 [2020-08-22 01:33:27,094 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 01:33:27,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:33:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 01:33:27,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-22 01:33:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 01:33:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-08-22 01:33:27,114 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 83 [2020-08-22 01:33:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:27,114 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-08-22 01:33:27,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:33:27,114 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-08-22 01:33:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 01:33:27,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:27,121 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 01:33:27,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:33:27,122 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:27,122 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-08-22 01:33:27,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:27,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317052678] [2020-08-22 01:33:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:33:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 01:33:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 01:33:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:33:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:33:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:33:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:33:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 01:33:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 01:33:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:33:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 01:33:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 01:33:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 01:33:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 01:33:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 01:33:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,462 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 01:33:27,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317052678] [2020-08-22 01:33:27,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:27,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:33:27,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770336685] [2020-08-22 01:33:27,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:33:27,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:27,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:33:27,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:33:27,466 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 13 states. [2020-08-22 01:33:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:27,664 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-08-22 01:33:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:33:27,664 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-22 01:33:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:27,665 INFO L225 Difference]: With dead ends: 83 [2020-08-22 01:33:27,665 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 01:33:27,668 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 01:33:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 01:33:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 01:33:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 01:33:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 01:33:27,670 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-08-22 01:33:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:27,670 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 01:33:27,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:33:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 01:33:27,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 01:33:27,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:33:27,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 01:33:28,115 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 01:33:28,115 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:33:28,115 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:33:28,116 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 01:33:28,116 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 01:33:28,116 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 01:33:28,116 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 01:33:28,116 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 01:33:28,116 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-22 01:33:28,116 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 01:33:28,117 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-22 01:33:28,117 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-22 01:33:28,117 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-08-22 01:33:28,117 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 01:33:28,117 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-22 01:33:28,117 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-22 01:33:28,118 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-08-22 01:33:28,118 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 01:33:28,118 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 01:33:28,118 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-08-22 01:33:28,118 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-08-22 01:33:28,118 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-08-22 01:33:28,119 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-22 01:33:28,120 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 01:33:28,120 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 01:33:28,120 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-22 01:33:28,121 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 01:33:28,121 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-08-22 01:33:28,121 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 01:33:28,122 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-22 01:33:28,122 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-22 01:33:28,122 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 01:33:28,122 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 01:33:28,122 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 01:33:28,122 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-22 01:33:28,123 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-22 01:33:28,123 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-22 01:33:28,123 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-22 01:33:28,123 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-22 01:33:28,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:33:28 BoogieIcfgContainer [2020-08-22 01:33:28,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:33:28,156 INFO L168 Benchmark]: Toolchain (without parser) took 5347.88 ms. Allocated memory was 141.0 MB in the beginning and 277.3 MB in the end (delta: 136.3 MB). Free memory was 103.9 MB in the beginning and 117.4 MB in the end (delta: -13.5 MB). Peak memory consumption was 122.8 MB. Max. memory is 7.1 GB. [2020-08-22 01:33:28,157 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 01:33:28,161 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.47 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 93.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 01:33:28,164 INFO L168 Benchmark]: Boogie Preprocessor took 130.10 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.4 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 01:33:28,165 INFO L168 Benchmark]: RCFGBuilder took 350.43 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 166.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-08-22 01:33:28,166 INFO L168 Benchmark]: TraceAbstraction took 4582.00 ms. Allocated memory was 203.4 MB in the beginning and 277.3 MB in the end (delta: 73.9 MB). Free memory was 165.8 MB in the beginning and 117.4 MB in the end (delta: 48.4 MB). Peak memory consumption was 122.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:33:28,177 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.47 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 93.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.10 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.4 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 350.43 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 166.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4582.00 ms. Allocated memory was 203.4 MB in the beginning and 277.3 MB in the end (delta: 73.9 MB). Free memory was 165.8 MB in the beginning and 117.4 MB in the end (delta: 48.4 MB). Peak memory consumption was 122.3 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: 4.0s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 422 SDtfs, 351 SDslu, 1324 SDs, 0 SdLazy, 750 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s 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, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s 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...