/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --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-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:20:21,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:20:21,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:20:21,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:20:21,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:20:21,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:20:21,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:20:21,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:20:21,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:20:21,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:20:21,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:20:21,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:20:21,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:20:21,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:20:21,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:20:21,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:20:21,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:20:21,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:20:21,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:20:21,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:20:21,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:20:21,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:20:21,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:20:21,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:20:21,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:20:21,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:20:21,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:20:21,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:20:21,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:20:21,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:20:21,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:20:21,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:20:21,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:20:21,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:20:21,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:20:21,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:20:21,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:20:21,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:20:21,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:20:21,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:20:21,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:20:21,651 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 [2020-09-25 02:20:21,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:20:21,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:20:21,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:20:21,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:20:21,694 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:20:21,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:20:21,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:20:21,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:20:21,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:20:21,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:20:21,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:20:21,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:20:21,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:20:21,697 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:20:21,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:20:21,697 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:20:21,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:20:21,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:20:21,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:20:21,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:20:21,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:20:21,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:20:21,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:20:21,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:20:21,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:20:21,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:20:21,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:20:21,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:20:21,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:20:21,702 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:20:22,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:20:22,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:20:22,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:20:22,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:20:22,261 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:20:22,262 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 02:20:22,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16dc6fd99/14cba897636349a5b9f4dd861eed3db9/FLAG355ce0ca4 [2020-09-25 02:20:22,875 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:20:22,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 02:20:22,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16dc6fd99/14cba897636349a5b9f4dd861eed3db9/FLAG355ce0ca4 [2020-09-25 02:20:23,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16dc6fd99/14cba897636349a5b9f4dd861eed3db9 [2020-09-25 02:20:23,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:20:23,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:20:23,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:20:23,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:20:23,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:20:23,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21af3704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23, skipping insertion in model container [2020-09-25 02:20:23,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:20:23,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:20:23,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:20:23,508 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:20:23,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:20:23,542 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:20:23,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23 WrapperNode [2020-09-25 02:20:23,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:20:23,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:20:23,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:20:23,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:20:23,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (1/1) ... [2020-09-25 02:20:23,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:20:23,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:20:23,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:20:23,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:20:23,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (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 [2020-09-25 02:20:23,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:20:23,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:20:23,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:20:23,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:20:23,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:20:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:20:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:20:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:20:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:20:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:20:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:20:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:20:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:20:24,045 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:20:24,045 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:20:24,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:20:24 BoogieIcfgContainer [2020-09-25 02:20:24,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:20:24,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:20:24,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:20:24,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:20:24,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:20:23" (1/3) ... [2020-09-25 02:20:24,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e79c826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:20:24, skipping insertion in model container [2020-09-25 02:20:24,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:23" (2/3) ... [2020-09-25 02:20:24,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e79c826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:20:24, skipping insertion in model container [2020-09-25 02:20:24,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:20:24" (3/3) ... [2020-09-25 02:20:24,066 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-25 02:20:24,079 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:20:24,090 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:20:24,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:20:24,149 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:20:24,150 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:20:24,150 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:20:24,150 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:20:24,150 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:20:24,150 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:20:24,151 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:20:24,151 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:20:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 02:20:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 02:20:24,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:24,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:24,188 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-25 02:20:24,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:24,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144058781] [2020-09-25 02:20:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:24,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:24,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:24,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:24,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 02:20:24,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:20:24,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-09-25 02:20:24,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:20:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:24,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:20:24,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:24,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:24,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:24,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:24,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:24,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:20:24,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:24,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:24,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:24,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144058781] [2020-09-25 02:20:24,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:24,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 02:20:24,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712042740] [2020-09-25 02:20:24,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 02:20:24,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:24,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 02:20:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:20:24,557 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 02:20:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:24,584 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 02:20:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 02:20:24,585 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 02:20:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:24,595 INFO L225 Difference]: With dead ends: 41 [2020-09-25 02:20:24,595 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 02:20:24,600 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 [2020-09-25 02:20:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 02:20:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-25 02:20:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 02:20:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 02:20:24,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-25 02:20:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:24,643 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 02:20:24,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 02:20:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 02:20:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 02:20:24,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:24,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:24,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:20:24,645 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-25 02:20:24,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:24,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761127446] [2020-09-25 02:20:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:24,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:24,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:24,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:24,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 02:20:24,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:20:24,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-09-25 02:20:24,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:24,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:20:24,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:20:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 02:20:24,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:24,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:24,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:24,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:24,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:24,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:24,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:20:24,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:24,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:24,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:24,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:24,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 02:20:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:24,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761127446] [2020-09-25 02:20:24,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:24,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:20:24,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292777507] [2020-09-25 02:20:24,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:20:24,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:20:24,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:20:24,944 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-09-25 02:20:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:25,028 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-25 02:20:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:20:25,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-25 02:20:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:25,032 INFO L225 Difference]: With dead ends: 50 [2020-09-25 02:20:25,032 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 02:20:25,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:20:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 02:20:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-09-25 02:20:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 02:20:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 02:20:25,042 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-25 02:20:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:25,043 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 02:20:25,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:20:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 02:20:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 02:20:25,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:25,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:25,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:20:25,045 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-09-25 02:20:25,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:25,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88351995] [2020-09-25 02:20:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:25,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:25,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 02:20:25,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:25,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-25 02:20:25,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:20:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:20:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 02:20:25,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:25,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:25,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:25,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:25,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:25,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:25,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:25,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:25,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:25,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:25,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:25,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88351995] [2020-09-25 02:20:25,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:25,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 02:20:25,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689842704] [2020-09-25 02:20:25,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:20:25,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:20:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:20:25,255 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-09-25 02:20:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:25,338 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-25 02:20:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:20:25,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-25 02:20:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:25,340 INFO L225 Difference]: With dead ends: 38 [2020-09-25 02:20:25,341 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 02:20:25,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:20:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 02:20:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 02:20:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 02:20:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 02:20:25,347 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-09-25 02:20:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:25,348 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 02:20:25,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:20:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 02:20:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 02:20:25,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:25,349 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:25,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:20:25,349 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-25 02:20:25,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:25,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854667386] [2020-09-25 02:20:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:25,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:25,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 02:20:25,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:20:25,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-09-25 02:20:25,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:20:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:20:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 02:20:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:25,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:25,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:25,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:25,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:25,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:25,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:25,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:25,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854667386] [2020-09-25 02:20:25,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:25,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 02:20:25,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629486407] [2020-09-25 02:20:25,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:20:25,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:20:25,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:20:25,662 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-25 02:20:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:25,754 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-09-25 02:20:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:20:25,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-25 02:20:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:25,756 INFO L225 Difference]: With dead ends: 59 [2020-09-25 02:20:25,756 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 02:20:25,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:20:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 02:20:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-09-25 02:20:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 02:20:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 02:20:25,764 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-09-25 02:20:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:25,765 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 02:20:25,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:20:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 02:20:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 02:20:25,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:25,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:25,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:20:25,766 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-09-25 02:20:25,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:25,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556693950] [2020-09-25 02:20:25,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:25,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:25,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 02:20:25,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:25,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 02:20:25,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:20:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:20:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 02:20:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:25,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:25,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:25,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:25,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:25,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:25,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:25,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:25,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:25,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:25,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:25,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556693950] [2020-09-25 02:20:25,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:25,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:20:25,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649870449] [2020-09-25 02:20:25,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:20:25,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:20:25,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:20:25,932 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-25 02:20:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:25,992 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-25 02:20:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 02:20:25,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-25 02:20:25,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:25,994 INFO L225 Difference]: With dead ends: 46 [2020-09-25 02:20:25,994 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 02:20:25,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:20:25,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 02:20:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 02:20:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 02:20:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 02:20:26,001 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-09-25 02:20:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:26,002 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 02:20:26,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:20:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 02:20:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 02:20:26,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:26,003 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:26,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:20:26,004 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:26,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-09-25 02:20:26,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:26,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306708694] [2020-09-25 02:20:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:26,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:26,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 02:20:26,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:20:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-09-25 02:20:26,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:20:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:20:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 02:20:26,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:26,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:26,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:26,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:26,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:26,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:26,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:26,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:26,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:26,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306708694] [2020-09-25 02:20:26,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:26,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 02:20:26,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051584863] [2020-09-25 02:20:26,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:20:26,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:26,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:20:26,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:20:26,563 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-09-25 02:20:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:26,653 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-25 02:20:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 02:20:26,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-25 02:20:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:26,655 INFO L225 Difference]: With dead ends: 68 [2020-09-25 02:20:26,655 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 02:20:26,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:20:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 02:20:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-09-25 02:20:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 02:20:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-25 02:20:26,663 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-09-25 02:20:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:26,663 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-25 02:20:26,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:20:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-25 02:20:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 02:20:26,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:26,665 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:26,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:20:26,666 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:26,666 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-09-25 02:20:26,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:26,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706741047] [2020-09-25 02:20:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:26,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:26,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 02:20:26,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:26,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-25 02:20:26,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:26,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:20:26,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:20:26,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 02:20:26,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:26,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:26,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:26,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:26,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:26,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:26,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:26,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:26,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:26,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706741047] [2020-09-25 02:20:26,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:26,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:20:26,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826588084] [2020-09-25 02:20:26,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:20:26,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:20:26,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:20:26,899 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-09-25 02:20:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:27,012 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-25 02:20:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:20:27,013 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-25 02:20:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:27,014 INFO L225 Difference]: With dead ends: 55 [2020-09-25 02:20:27,014 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 02:20:27,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:20:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 02:20:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-25 02:20:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 02:20:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-25 02:20:27,021 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-09-25 02:20:27,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:27,021 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-25 02:20:27,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:20:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-25 02:20:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 02:20:27,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:27,023 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:27,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:20:27,024 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:27,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-09-25 02:20:27,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:27,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646272265] [2020-09-25 02:20:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:27,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:27,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 02:20:27,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 02:20:27,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-09-25 02:20:27,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:20:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:20:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 02:20:27,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:27,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:27,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:27,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:27,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:27,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:27,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:27,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:27,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:27,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646272265] [2020-09-25 02:20:27,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:27,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:20:27,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712847319] [2020-09-25 02:20:27,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:20:27,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:27,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:20:27,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:20:27,862 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-09-25 02:20:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:27,973 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-09-25 02:20:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 02:20:27,973 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-25 02:20:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:27,975 INFO L225 Difference]: With dead ends: 77 [2020-09-25 02:20:27,975 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 02:20:27,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:20:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 02:20:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-09-25 02:20:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 02:20:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-25 02:20:27,982 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-09-25 02:20:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:27,983 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-25 02:20:27,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:20:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-25 02:20:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 02:20:27,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:27,984 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:27,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:20:27,985 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-09-25 02:20:27,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:27,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039315557] [2020-09-25 02:20:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:28,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:28,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 02:20:28,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:28,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-09-25 02:20:28,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:28,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:20:28,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:20:28,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 02:20:28,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:28,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:28,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:28,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:28,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:28,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:28,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:28,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:28,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:28,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:28,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039315557] [2020-09-25 02:20:28,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:28,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:20:28,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053230414] [2020-09-25 02:20:28,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:20:28,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:20:28,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:20:28,303 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-09-25 02:20:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:28,465 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-25 02:20:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 02:20:28,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-25 02:20:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:28,467 INFO L225 Difference]: With dead ends: 64 [2020-09-25 02:20:28,467 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 02:20:28,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:20:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 02:20:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-25 02:20:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-25 02:20:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-25 02:20:28,474 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-09-25 02:20:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:28,474 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-25 02:20:28,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:20:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-25 02:20:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 02:20:28,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:28,476 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:28,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:20:28,476 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-09-25 02:20:28,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:28,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205847173] [2020-09-25 02:20:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:28,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:28,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:29,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:29,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:29,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:30,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:30,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 02:20:30,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:20:30,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1602 [2020-09-25 02:20:30,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:30,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 02:20:30,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:20:30,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 02:20:30,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:30,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:30,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:30,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:30,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:30,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:30,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:30,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:30,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:30,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205847173] [2020-09-25 02:20:30,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:30,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:20:30,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869749749] [2020-09-25 02:20:30,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:20:30,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:20:30,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:20:30,164 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-09-25 02:20:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:30,274 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-09-25 02:20:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:20:30,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-25 02:20:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:30,276 INFO L225 Difference]: With dead ends: 86 [2020-09-25 02:20:30,276 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 02:20:30,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:20:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 02:20:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-25 02:20:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 02:20:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-25 02:20:30,283 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-09-25 02:20:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:30,283 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-25 02:20:30,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:20:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-25 02:20:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 02:20:30,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:30,285 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:30,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 02:20:30,285 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-09-25 02:20:30,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:30,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049775444] [2020-09-25 02:20:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:30,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:30,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:30,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 02:20:30,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:30,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-09-25 02:20:30,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:20:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:20:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 02:20:30,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:30,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:30,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:30,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:30,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:30,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:30,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:30,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049775444] [2020-09-25 02:20:30,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:30,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:20:30,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975144373] [2020-09-25 02:20:30,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:20:30,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:20:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:20:30,731 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 12 states. [2020-09-25 02:20:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:30,922 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-25 02:20:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:20:30,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-25 02:20:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:30,924 INFO L225 Difference]: With dead ends: 73 [2020-09-25 02:20:30,924 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 02:20:30,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-25 02:20:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 02:20:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-25 02:20:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-25 02:20:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-25 02:20:30,938 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-09-25 02:20:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:30,939 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-25 02:20:30,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:20:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-25 02:20:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 02:20:30,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:30,944 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:30,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 02:20:30,944 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-09-25 02:20:30,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:30,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428111410] [2020-09-25 02:20:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:30,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:31,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:31,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:32,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:32,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:32,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:32,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:32,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:33,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:33,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:33,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 02:20:33,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 02:20:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2296 [2020-09-25 02:20:33,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:20:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:20:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 02:20:33,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:33,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:33,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:33,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:33,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:33,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:33,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:33,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:33,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428111410] [2020-09-25 02:20:33,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:33,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 02:20:33,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114565841] [2020-09-25 02:20:33,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 02:20:33,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:33,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 02:20:33,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:20:33,371 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-09-25 02:20:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:33,492 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-09-25 02:20:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 02:20:33,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-09-25 02:20:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:33,494 INFO L225 Difference]: With dead ends: 95 [2020-09-25 02:20:33,494 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 02:20:33,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-09-25 02:20:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 02:20:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-09-25 02:20:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 02:20:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-25 02:20:33,499 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-09-25 02:20:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:33,500 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-25 02:20:33,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 02:20:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-25 02:20:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 02:20:33,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:33,501 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:33,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 02:20:33,502 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-09-25 02:20:33,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:33,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053089489] [2020-09-25 02:20:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:33,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:33,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 02:20:33,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:33,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-09-25 02:20:33,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:33,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 02:20:33,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:20:33,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 02:20:33,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:34,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:34,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:34,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:34,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:34,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:34,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:34,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:34,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:34,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053089489] [2020-09-25 02:20:34,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:34,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 02:20:34,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89140852] [2020-09-25 02:20:34,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 02:20:34,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:34,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 02:20:34,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 02:20:34,019 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-09-25 02:20:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:34,273 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-25 02:20:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 02:20:34,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-09-25 02:20:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:34,275 INFO L225 Difference]: With dead ends: 82 [2020-09-25 02:20:34,275 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 02:20:34,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-25 02:20:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 02:20:34,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-25 02:20:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 02:20:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-25 02:20:34,280 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-09-25 02:20:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:34,281 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-25 02:20:34,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 02:20:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-25 02:20:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 02:20:34,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:34,282 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:34,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 02:20:34,282 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:34,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:34,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-09-25 02:20:34,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:34,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26187485] [2020-09-25 02:20:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:34,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:34,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:35,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:36,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:36,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:36,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:36,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:37,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:37,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:37,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 02:20:37,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 02:20:37,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3174 [2020-09-25 02:20:37,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:37,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:20:37,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:20:37,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 02:20:37,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:37,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:37,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:37,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:37,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:37,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:37,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:37,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:37,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:37,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:37,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:37,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:37,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26187485] [2020-09-25 02:20:37,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:37,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:20:37,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963789261] [2020-09-25 02:20:37,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:20:37,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:20:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:20:37,568 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-09-25 02:20:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:37,715 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-09-25 02:20:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 02:20:37,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 02:20:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:37,717 INFO L225 Difference]: With dead ends: 104 [2020-09-25 02:20:37,717 INFO L226 Difference]: Without dead ends: 88 [2020-09-25 02:20:37,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-25 02:20:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-25 02:20:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-09-25 02:20:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 02:20:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-09-25 02:20:37,731 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-09-25 02:20:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:37,732 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-09-25 02:20:37,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:20:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-09-25 02:20:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 02:20:37,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:37,735 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:37,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 02:20:37,736 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:37,736 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-09-25 02:20:37,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:37,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445113915] [2020-09-25 02:20:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:37,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:38,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:38,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 02:20:38,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:38,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-09-25 02:20:38,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 02:20:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:20:38,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-25 02:20:38,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:38,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:38,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:38,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:38,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:38,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:38,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:38,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445113915] [2020-09-25 02:20:38,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:38,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 02:20:38,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220643542] [2020-09-25 02:20:38,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 02:20:38,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 02:20:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-25 02:20:38,383 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-09-25 02:20:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:38,703 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-09-25 02:20:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 02:20:38,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-09-25 02:20:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:38,704 INFO L225 Difference]: With dead ends: 91 [2020-09-25 02:20:38,704 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 02:20:38,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-25 02:20:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 02:20:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-09-25 02:20:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 02:20:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-25 02:20:38,712 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-09-25 02:20:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:38,712 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-25 02:20:38,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 02:20:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-25 02:20:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-25 02:20:38,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:38,718 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:38,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 02:20:38,718 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-09-25 02:20:38,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:38,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651336015] [2020-09-25 02:20:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:38,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:38,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:39,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:39,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:40,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:41,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:41,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:42,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:42,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:42,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:42,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:42,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:43,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:43,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 02:20:43,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 02:20:43,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4264 [2020-09-25 02:20:43,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:43,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:20:43,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:20:43,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-25 02:20:43,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:43,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:43,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:43,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:43,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:43,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:43,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:43,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:43,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:43,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:43,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:43,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651336015] [2020-09-25 02:20:43,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:43,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:20:43,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404255993] [2020-09-25 02:20:43,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:20:43,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:20:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:20:43,105 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-09-25 02:20:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:43,265 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-09-25 02:20:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 02:20:43,266 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-09-25 02:20:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:43,267 INFO L225 Difference]: With dead ends: 113 [2020-09-25 02:20:43,267 INFO L226 Difference]: Without dead ends: 97 [2020-09-25 02:20:43,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-09-25 02:20:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-25 02:20:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-09-25 02:20:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 02:20:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-09-25 02:20:43,272 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-09-25 02:20:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:43,272 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-09-25 02:20:43,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:20:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-09-25 02:20:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-25 02:20:43,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:43,274 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:43,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 02:20:43,274 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:43,274 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-09-25 02:20:43,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:43,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354283714] [2020-09-25 02:20:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:43,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:43,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:43,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 02:20:43,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:43,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-09-25 02:20:43,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:43,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 02:20:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:20:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 02:20:43,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:43,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:43,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:43,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:43,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:43,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:43,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:43,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:43,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:43,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:43,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:43,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 27 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:44,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354283714] [2020-09-25 02:20:44,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:44,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 02:20:44,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455720588] [2020-09-25 02:20:44,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 02:20:44,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:44,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 02:20:44,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 02:20:44,009 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 18 states. [2020-09-25 02:20:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:44,229 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2020-09-25 02:20:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 02:20:44,229 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-09-25 02:20:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:44,230 INFO L225 Difference]: With dead ends: 87 [2020-09-25 02:20:44,230 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 02:20:44,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2020-09-25 02:20:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 02:20:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 02:20:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 02:20:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 02:20:44,234 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-09-25 02:20:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:44,234 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 02:20:44,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 02:20:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 02:20:44,234 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 02:20:44,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 02:20:44,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 02:20:44,431 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 02:20:44,431 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:20:44,431 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:20:44,431 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 02:20:44,431 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 02:20:44,432 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 02:20:44,432 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:44,432 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:44,432 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 02:20:44,432 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 02:20:44,432 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:44,432 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-09-25 02:20:44,433 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 02:20:44,433 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 02:20:44,433 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-09-25 02:20:44,433 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-09-25 02:20:44,433 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 02:20:44,433 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 02:20:44,433 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 02:20:44,434 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 02:20:44,434 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-09-25 02:20:44,434 INFO L268 CegarLoopResult]: For program point L16-5(lines 16 19) no Hoare annotation was computed. [2020-09-25 02:20:44,434 INFO L268 CegarLoopResult]: For program point L16-6(line 16) no Hoare annotation was computed. [2020-09-25 02:20:44,434 INFO L268 CegarLoopResult]: For program point L16-7(line 16) no Hoare annotation was computed. [2020-09-25 02:20:44,434 INFO L268 CegarLoopResult]: For program point L16-9(line 16) no Hoare annotation was computed. [2020-09-25 02:20:44,435 INFO L268 CegarLoopResult]: For program point L16-10(line 16) no Hoare annotation was computed. [2020-09-25 02:20:44,436 INFO L264 CegarLoopResult]: At program point L16-11(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 2))) (or (and (< 0 (+ main_~y~0 1)) (<= (* 3 main_~y~0) .cse0) (<= 1 (+ main_~x~0 main_~y~0))) (and (<= (* 2 main_~y~0) .cse0) (<= 2 main_~y~0)))) [2020-09-25 02:20:44,436 INFO L264 CegarLoopResult]: At program point L16-12(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-09-25 02:20:44,436 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 02:20:44,436 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 02:20:44,436 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 02:20:44,437 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 02:20:44,437 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 02:20:44,438 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 02:20:44,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:20:44 BoogieIcfgContainer [2020-09-25 02:20:44,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:20:44,475 INFO L168 Benchmark]: Toolchain (without parser) took 21236.89 ms. Allocated memory was 143.7 MB in the beginning and 380.1 MB in the end (delta: 236.5 MB). Free memory was 100.0 MB in the beginning and 86.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 250.0 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:44,476 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 143.7 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 02:20:44,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.22 ms. Allocated memory is still 143.7 MB. Free memory was 99.4 MB in the beginning and 89.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:44,483 INFO L168 Benchmark]: Boogie Preprocessor took 126.05 ms. Allocated memory was 143.7 MB in the beginning and 199.8 MB in the end (delta: 56.1 MB). Free memory was 89.7 MB in the beginning and 179.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:44,484 INFO L168 Benchmark]: RCFGBuilder took 380.73 ms. Allocated memory is still 199.8 MB. Free memory was 179.6 MB in the beginning and 165.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:44,487 INFO L168 Benchmark]: TraceAbstraction took 20411.75 ms. Allocated memory was 199.8 MB in the beginning and 380.1 MB in the end (delta: 180.4 MB). Free memory was 165.1 MB in the beginning and 86.5 MB in the end (delta: 78.7 MB). Peak memory consumption was 259.0 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:44,493 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 143.7 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.22 ms. Allocated memory is still 143.7 MB. Free memory was 99.4 MB in the beginning and 89.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.05 ms. Allocated memory was 143.7 MB in the beginning and 199.8 MB in the end (delta: 56.1 MB). Free memory was 89.7 MB in the beginning and 179.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.73 ms. Allocated memory is still 199.8 MB. Free memory was 179.6 MB in the beginning and 165.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20411.75 ms. Allocated memory was 199.8 MB in the beginning and 380.1 MB in the end (delta: 180.4 MB). Free memory was 165.1 MB in the beginning and 86.5 MB in the end (delta: 78.7 MB). Peak memory consumption was 259.0 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: 16]: Loop Invariant Derived loop invariant: ((0 < y + 1 && 3 * y <= x + 2) && 1 <= x + y) || (2 * y <= x + 2 && 2 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.0s, OverallIterations: 17, TraceHistogramMax: 8, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 452 SDtfs, 742 SDslu, 2427 SDs, 0 SdLazy, 973 SolverSat, 133 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=16, 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, 17 MinimizatonAttempts, 102 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 23 PreInvPairs, 38 NumberOfFragments, 38 HoareAnnotationTreeSize, 23 FomulaSimplifications, 165 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 144 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 16.8s InterpolantComputationTime, 771 NumberOfCodeBlocks, 771 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 754 ConstructedInterpolants, 0 QuantifiedInterpolants, 161964 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 55/1232 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...