/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 SequenceOfStatements --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 --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_palindrome_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:57:40,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:57:40,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:57:40,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:57:40,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:57:40,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:57:40,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:57:40,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:57:40,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:57:40,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:57:40,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:57:40,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:57:40,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:57:40,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:57:40,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:57:40,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:57:40,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:57:40,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:57:40,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:57:40,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:57:40,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:57:40,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:57:40,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:57:40,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:57:40,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:57:40,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:57:40,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:57:40,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:57:40,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:57:40,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:57:40,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:57:40,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:57:40,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:57:40,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:57:40,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:57:40,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:57:40,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:57:40,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:57:40,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:57:40,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:57:40,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:57:40,496 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 [2020-10-13 04:57:40,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:57:40,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:57:40,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:57:40,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:57:40,520 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:57:40,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:57:40,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:57:40,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:57:40,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:57:40,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:57:40,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:57:40,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:57:40,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:57:40,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:57:40,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:57:40,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:57:40,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:57:40,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:57:40,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:57:40,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:57:40,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:57:40,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:57:40,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:57:40,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:57:40,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:57:40,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:57:40,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:57:40,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:57:40,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:57:40,525 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 -> SequenceOfStatements 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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=true; [2020-10-13 04:57:40,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:57:40,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:57:40,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:57:40,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:57:40,869 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:57:40,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_palindrome_ground.i [2020-10-13 04:57:40,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b2ed7c51/a7f03e07293d45eab7445100350288e2/FLAG31397ddbe [2020-10-13 04:57:41,339 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:57:41,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_palindrome_ground.i [2020-10-13 04:57:41,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b2ed7c51/a7f03e07293d45eab7445100350288e2/FLAG31397ddbe [2020-10-13 04:57:41,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b2ed7c51/a7f03e07293d45eab7445100350288e2 [2020-10-13 04:57:41,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:57:41,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:57:41,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:57:41,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:57:41,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:57:41,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:57:41" (1/1) ... [2020-10-13 04:57:41,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770ea115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:41, skipping insertion in model container [2020-10-13 04:57:41,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:57:41" (1/1) ... [2020-10-13 04:57:41,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:57:41,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:57:42,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:57:42,044 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:57:42,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:57:42,089 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:57:42,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42 WrapperNode [2020-10-13 04:57:42,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:57:42,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:57:42,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:57:42,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:57:42,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (1/1) ... [2020-10-13 04:57:42,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (1/1) ... [2020-10-13 04:57:42,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (1/1) ... [2020-10-13 04:57:42,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (1/1) ... [2020-10-13 04:57:42,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (1/1) ... [2020-10-13 04:57:42,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (1/1) ... [2020-10-13 04:57:42,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (1/1) ... [2020-10-13 04:57:42,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:57:42,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:57:42,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:57:42,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:57:42,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (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 [2020-10-13 04:57:42,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:57:42,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:57:42,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:57:42,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:57:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:57:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:57:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:57:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:57:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:57:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:57:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:57:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:57:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:57:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:57:42,636 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:57:42,637 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:57:42,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:57:42 BoogieIcfgContainer [2020-10-13 04:57:42,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:57:42,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:57:42,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:57:42,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:57:42,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:57:41" (1/3) ... [2020-10-13 04:57:42,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e8f598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:57:42, skipping insertion in model container [2020-10-13 04:57:42,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:57:42" (2/3) ... [2020-10-13 04:57:42,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e8f598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:57:42, skipping insertion in model container [2020-10-13 04:57:42,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:57:42" (3/3) ... [2020-10-13 04:57:42,649 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_palindrome_ground.i [2020-10-13 04:57:42,658 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:57:42,664 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:57:42,676 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:57:42,700 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:57:42,700 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:57:42,701 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:57:42,701 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:57:42,701 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:57:42,701 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:57:42,701 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:57:42,701 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:57:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 04:57:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:57:42,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:42,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:42,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:42,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2020-10-13 04:57:42,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:42,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321482506] [2020-10-13 04:57:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:42,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:43,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:57:43,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:43,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-13 04:57:43,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:57:43,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:43,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:57:43,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:43,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:43,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:43,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:43,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:57:43,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:43,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:43,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:57:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:57:43,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321482506] [2020-10-13 04:57:43,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:57:43,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:57:43,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208579963] [2020-10-13 04:57:43,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:57:43,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:57:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:57:43,165 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 04:57:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:43,270 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-13 04:57:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:57:43,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 04:57:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:43,281 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:57:43,281 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 04:57:43,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:57:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 04:57:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 04:57:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:57:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 04:57:43,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-13 04:57:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:43,328 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 04:57:43,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:57:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 04:57:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:57:43,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:43,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:43,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:57:43,330 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:43,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:43,331 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2020-10-13 04:57:43,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:43,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750328634] [2020-10-13 04:57:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:43,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:43,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:57:43,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 04:57:43,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:57:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:57:43,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:43,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:43,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:43,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:43,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:43,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 04:57:43,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:43,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:43,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:43,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:43,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:57:43,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750328634] [2020-10-13 04:57:43,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:57:43,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:57:43,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96235347] [2020-10-13 04:57:43,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:57:43,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:43,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:57:43,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:57:43,531 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-13 04:57:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:43,612 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-13 04:57:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:57:43,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 04:57:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:43,614 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:57:43,614 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 04:57:43,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:57:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 04:57:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-13 04:57:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:57:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 04:57:43,623 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2020-10-13 04:57:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:43,623 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 04:57:43,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:57:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 04:57:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:57:43,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:43,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:43,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:57:43,625 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:43,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2020-10-13 04:57:43,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:43,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989664836] [2020-10-13 04:57:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:43,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:44,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:44,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:57:44,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-13 04:57:44,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:57:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:57:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:57:44,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:44,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:44,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:44,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:44,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:44,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:44,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:57:44,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:44,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:57:44,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989664836] [2020-10-13 04:57:44,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:44,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:57:44,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640615370] [2020-10-13 04:57:44,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:57:44,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:44,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:57:44,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:57:44,393 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-13 04:57:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:44,471 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-13 04:57:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:57:44,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 04:57:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:44,473 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:57:44,473 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 04:57:44,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:57:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 04:57:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-13 04:57:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:57:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 04:57:44,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2020-10-13 04:57:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:44,481 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 04:57:44,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:57:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 04:57:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:57:44,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:44,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:44,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:57:44,482 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1582955806, now seen corresponding path program 2 times [2020-10-13 04:57:44,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:44,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45666606] [2020-10-13 04:57:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:44,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:45,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:45,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:57:45,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:45,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-13 04:57:45,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:57:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:57:45,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:45,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:45,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:45,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:45,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:45,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:45,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:57:45,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:45,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:45,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:45,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:45,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:57:45,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45666606] [2020-10-13 04:57:45,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:45,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:57:45,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894315320] [2020-10-13 04:57:45,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:57:45,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:45,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:57:45,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:57:45,472 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-13 04:57:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:45,589 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 04:57:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:57:45,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 04:57:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:45,591 INFO L225 Difference]: With dead ends: 51 [2020-10-13 04:57:45,591 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:57:45,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:57:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:57:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 04:57:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:57:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 04:57:45,598 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-13 04:57:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:45,599 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 04:57:45,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:57:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 04:57:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:57:45,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:45,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:45,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:57:45,601 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash -657216102, now seen corresponding path program 3 times [2020-10-13 04:57:45,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:45,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373029838] [2020-10-13 04:57:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:45,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:45,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:45,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:47,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:57:47,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:47,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1712 [2020-10-13 04:57:47,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:47,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:57:47,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:47,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:57:47,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:47,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:47,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:47,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:47,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:47,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:57:47,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:47,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:47,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:47,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:47,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:57:47,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373029838] [2020-10-13 04:57:47,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:47,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:57:47,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725074232] [2020-10-13 04:57:47,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:57:47,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:47,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:57:47,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:57:47,418 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-13 04:57:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:47,580 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-13 04:57:47,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:57:47,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 04:57:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:47,583 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:57:47,583 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:57:47,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:57:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:57:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-13 04:57:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:57:47,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 04:57:47,602 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-13 04:57:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:47,603 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 04:57:47,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:57:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 04:57:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:57:47,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:47,606 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:47,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:57:47,606 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:47,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:47,607 INFO L82 PathProgramCache]: Analyzing trace with hash 702132246, now seen corresponding path program 4 times [2020-10-13 04:57:47,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:47,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069563244] [2020-10-13 04:57:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:51,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:51,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:57:51,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:51,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3539 [2020-10-13 04:57:51,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:57:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:57:51,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:51,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:51,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:51,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:51,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:51,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:51,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:57:51,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:51,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:51,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:51,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:51,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:57:51,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069563244] [2020-10-13 04:57:51,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:51,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:57:51,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034038429] [2020-10-13 04:57:51,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:57:51,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:51,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:57:51,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:57:51,252 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-10-13 04:57:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:51,382 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-13 04:57:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:57:51,383 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 04:57:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:51,384 INFO L225 Difference]: With dead ends: 63 [2020-10-13 04:57:51,384 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 04:57:51,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:57:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 04:57:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-13 04:57:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:57:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 04:57:51,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-10-13 04:57:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:51,398 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 04:57:51,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:57:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 04:57:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:57:51,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:51,401 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:51,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:57:51,402 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash -294189934, now seen corresponding path program 5 times [2020-10-13 04:57:51,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:51,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915032246] [2020-10-13 04:57:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:51,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:51,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:51,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:56,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:56,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:57:56,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:56,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:57:56,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:56,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:57:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:57:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:57:56,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:56,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:56,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:56,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:56,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:56,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:56,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:57:56,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:56,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:56,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:56,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:57:56,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915032246] [2020-10-13 04:57:56,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:56,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:57:56,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839651100] [2020-10-13 04:57:56,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:57:56,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:57:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:57:56,552 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-10-13 04:57:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:56,760 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-13 04:57:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:57:56,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 04:57:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:56,762 INFO L225 Difference]: With dead ends: 69 [2020-10-13 04:57:56,763 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 04:57:56,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:57:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 04:57:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-13 04:57:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:57:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 04:57:56,779 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-13 04:57:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:56,780 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 04:57:56,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:57:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 04:57:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:57:56,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:56,784 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:56,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:57:56,785 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1966517006, now seen corresponding path program 6 times [2020-10-13 04:57:56,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:56,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839456911] [2020-10-13 04:57:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:56,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:56,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:01,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:58:01,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:01,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:58:01,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:58:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:58:01,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:58:01,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:01,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:01,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:01,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:01,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:01,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:01,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:01,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:01,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:01,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:58:01,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839456911] [2020-10-13 04:58:01,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:01,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:58:01,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141354106] [2020-10-13 04:58:01,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:58:01,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:01,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:58:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:58:01,898 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-10-13 04:58:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:02,046 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-10-13 04:58:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:58:02,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 04:58:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:02,048 INFO L225 Difference]: With dead ends: 75 [2020-10-13 04:58:02,048 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:58:02,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:58:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:58:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 04:58:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:58:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 04:58:02,055 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-13 04:58:02,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:02,055 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 04:58:02,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:58:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 04:58:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:58:02,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:02,057 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:02,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:58:02,057 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1042523018, now seen corresponding path program 7 times [2020-10-13 04:58:02,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:02,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735388425] [2020-10-13 04:58:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:02,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:02,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:03,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:07,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:07,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:58:07,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:07,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:58:07,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:58:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:58:07,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:07,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:07,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:07,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:07,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:07,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:07,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:07,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:07,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:58:07,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735388425] [2020-10-13 04:58:07,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:07,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:58:07,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434374618] [2020-10-13 04:58:07,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:58:07,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:58:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:58:07,180 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 11 states. [2020-10-13 04:58:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:07,315 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-13 04:58:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:58:07,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-13 04:58:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:07,317 INFO L225 Difference]: With dead ends: 81 [2020-10-13 04:58:07,317 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 04:58:07,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:58:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 04:58:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-13 04:58:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:58:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 04:58:07,328 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-10-13 04:58:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:07,328 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 04:58:07,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:58:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 04:58:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:58:07,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:07,332 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:07,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:58:07,333 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:07,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2059988486, now seen corresponding path program 8 times [2020-10-13 04:58:07,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:07,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063898089] [2020-10-13 04:58:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:07,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:07,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:12,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:12,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:58:12,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:12,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:58:12,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:12,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:58:12,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:12,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:58:12,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:12,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:12,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:12,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:12,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:12,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:12,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:12,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:12,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:12,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:58:12,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063898089] [2020-10-13 04:58:12,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:12,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:58:12,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520370766] [2020-10-13 04:58:12,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:58:12,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:12,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:58:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:58:12,464 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 12 states. [2020-10-13 04:58:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:12,618 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-13 04:58:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:58:12,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-13 04:58:12,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:12,619 INFO L225 Difference]: With dead ends: 87 [2020-10-13 04:58:12,619 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 04:58:12,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:58:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 04:58:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-10-13 04:58:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:58:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 04:58:12,626 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 47 [2020-10-13 04:58:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:12,626 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 04:58:12,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:58:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 04:58:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:58:12,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:12,628 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:12,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:58:12,628 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:12,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1909355902, now seen corresponding path program 9 times [2020-10-13 04:58:12,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:12,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887563067] [2020-10-13 04:58:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:12,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:12,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:13,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:17,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:58:17,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:17,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:58:17,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:17,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:58:17,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:17,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:58:17,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:17,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:17,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:17,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:17,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:17,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:17,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:17,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:17,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:17,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:17,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:58:17,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887563067] [2020-10-13 04:58:17,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:17,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:58:17,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000407098] [2020-10-13 04:58:17,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:58:17,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:17,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:58:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:58:17,759 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2020-10-13 04:58:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:17,908 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-10-13 04:58:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:58:17,909 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 04:58:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:17,910 INFO L225 Difference]: With dead ends: 93 [2020-10-13 04:58:17,910 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 04:58:17,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:58:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 04:58:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-10-13 04:58:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:58:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-13 04:58:17,916 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2020-10-13 04:58:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:17,917 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-13 04:58:17,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:58:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-13 04:58:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 04:58:17,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:17,918 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:17,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:58:17,918 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1930921730, now seen corresponding path program 10 times [2020-10-13 04:58:17,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:17,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110589855] [2020-10-13 04:58:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:17,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:19,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:22,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:22,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:58:22,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:22,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:58:22,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:22,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:58:22,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:58:22,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:58:22,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:23,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:23,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:23,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:23,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:23,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:23,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:23,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:23,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:23,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:23,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:58:23,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110589855] [2020-10-13 04:58:23,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:23,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:58:23,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273278123] [2020-10-13 04:58:23,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:58:23,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:58:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:58:23,085 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 14 states. [2020-10-13 04:58:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:23,249 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-10-13 04:58:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:58:23,250 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-13 04:58:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:23,251 INFO L225 Difference]: With dead ends: 99 [2020-10-13 04:58:23,251 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 04:58:23,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:58:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 04:58:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-13 04:58:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:58:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 04:58:23,258 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-10-13 04:58:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:23,258 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 04:58:23,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:58:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 04:58:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:58:23,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:23,259 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:23,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:58:23,260 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:23,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1124550278, now seen corresponding path program 11 times [2020-10-13 04:58:23,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:23,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106817105] [2020-10-13 04:58:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:23,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:24,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:58:28,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:28,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:58:28,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:58:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:58:28,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:28,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:28,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:28,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:28,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:28,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:28,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:58:28,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106817105] [2020-10-13 04:58:28,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:28,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:58:28,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406076784] [2020-10-13 04:58:28,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:58:28,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:58:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:58:28,393 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 15 states. [2020-10-13 04:58:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:28,576 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-10-13 04:58:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:58:28,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-13 04:58:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:28,578 INFO L225 Difference]: With dead ends: 105 [2020-10-13 04:58:28,578 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 04:58:28,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:58:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 04:58:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-13 04:58:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:58:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 04:58:28,584 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 59 [2020-10-13 04:58:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:28,585 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 04:58:28,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:58:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 04:58:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:58:28,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:28,586 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:28,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:58:28,587 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash 367873014, now seen corresponding path program 12 times [2020-10-13 04:58:28,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:28,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132328270] [2020-10-13 04:58:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:30,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:33,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:33,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:58:33,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:33,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:58:33,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:58:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:58:33,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:33,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:33,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:33,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:33,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:33,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:33,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:33,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:33,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:33,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:33,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:33,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:58:33,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132328270] [2020-10-13 04:58:33,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:33,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:58:33,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337742977] [2020-10-13 04:58:33,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:58:33,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:33,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:58:33,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:58:33,768 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 16 states. [2020-10-13 04:58:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:33,974 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2020-10-13 04:58:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:58:33,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-13 04:58:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:33,976 INFO L225 Difference]: With dead ends: 111 [2020-10-13 04:58:33,976 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 04:58:33,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:58:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 04:58:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-13 04:58:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:58:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-13 04:58:33,990 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2020-10-13 04:58:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:33,990 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-13 04:58:33,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:58:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-13 04:58:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:58:33,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:33,992 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:33,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:58:33,992 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:33,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1060032398, now seen corresponding path program 13 times [2020-10-13 04:58:33,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:33,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632887353] [2020-10-13 04:58:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:34,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:39,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:58:39,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:39,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:58:39,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:58:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:58:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:39,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:39,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:39,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:39,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:39,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:39,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:39,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 04:58:39,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632887353] [2020-10-13 04:58:39,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:39,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:58:39,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92862997] [2020-10-13 04:58:39,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:58:39,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:58:39,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:58:39,212 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 17 states. [2020-10-13 04:58:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:39,401 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-10-13 04:58:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:58:39,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-13 04:58:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:39,403 INFO L225 Difference]: With dead ends: 117 [2020-10-13 04:58:39,403 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 04:58:39,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:58:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 04:58:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-10-13 04:58:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:58:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 04:58:39,409 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-13 04:58:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:39,410 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 04:58:39,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:58:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 04:58:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:58:39,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:39,411 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:39,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:58:39,411 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1741723922, now seen corresponding path program 14 times [2020-10-13 04:58:39,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:39,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331690641] [2020-10-13 04:58:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:39,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:44,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:44,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:58:44,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:58:44,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:58:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:58:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:58:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:44,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:44,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:44,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:44,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:44,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:44,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:44,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:44,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:44,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:44,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:44,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 04:58:44,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331690641] [2020-10-13 04:58:44,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:44,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:58:44,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210216052] [2020-10-13 04:58:44,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:58:44,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:58:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:58:44,671 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 18 states. [2020-10-13 04:58:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:44,870 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-10-13 04:58:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:58:44,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2020-10-13 04:58:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:44,872 INFO L225 Difference]: With dead ends: 123 [2020-10-13 04:58:44,873 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 04:58:44,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:58:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 04:58:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-13 04:58:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:58:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 04:58:44,891 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 71 [2020-10-13 04:58:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:44,891 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 04:58:44,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:58:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 04:58:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:58:44,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:44,893 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:44,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:58:44,897 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:44,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1475154070, now seen corresponding path program 15 times [2020-10-13 04:58:44,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:44,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185769897] [2020-10-13 04:58:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:44,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:44,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:48,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:49,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:49,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:58:49,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:58:49,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:58:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:58:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:50,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:50,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:50,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:50,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:50,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:50,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:50,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:50,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:50,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:58:50,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185769897] [2020-10-13 04:58:50,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:50,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:58:50,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593275169] [2020-10-13 04:58:50,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:58:50,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:50,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:58:50,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:58:50,146 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 19 states. [2020-10-13 04:58:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:50,375 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-10-13 04:58:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:58:50,376 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2020-10-13 04:58:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:50,377 INFO L225 Difference]: With dead ends: 129 [2020-10-13 04:58:50,377 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 04:58:50,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:58:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 04:58:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-10-13 04:58:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:58:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-13 04:58:50,393 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 75 [2020-10-13 04:58:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:50,393 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-13 04:58:50,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:58:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-13 04:58:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 04:58:50,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:50,395 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:50,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:58:50,396 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1375286810, now seen corresponding path program 16 times [2020-10-13 04:58:50,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:50,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771270197] [2020-10-13 04:58:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:50,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:50,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:55,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:55,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 04:58:55,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:58:55,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:58:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:58:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:58:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:55,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:55,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:55,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:55,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:55,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:55,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:55,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:55,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:55,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:55,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 04:58:55,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771270197] [2020-10-13 04:58:55,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:55,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:58:55,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324893555] [2020-10-13 04:58:55,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:58:55,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:55,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:58:55,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:58:55,701 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 20 states. [2020-10-13 04:58:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:56,000 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2020-10-13 04:58:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:58:56,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-10-13 04:58:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:56,002 INFO L225 Difference]: With dead ends: 135 [2020-10-13 04:58:56,002 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 04:58:56,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:58:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 04:58:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-13 04:58:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:58:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-13 04:58:56,013 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 79 [2020-10-13 04:58:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:56,014 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-13 04:58:56,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:58:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-13 04:58:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:58:56,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:56,015 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:56,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:58:56,016 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:56,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1726613918, now seen corresponding path program 17 times [2020-10-13 04:58:56,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:56,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441179370] [2020-10-13 04:58:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:56,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:56,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:01,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:01,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:59:01,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:01,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:59:01,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:59:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:59:01,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:01,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:01,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:01,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:01,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:01,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:01,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:01,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:01,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:01,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:01,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:01,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 04:59:01,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441179370] [2020-10-13 04:59:01,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:01,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:59:01,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990708214] [2020-10-13 04:59:01,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:59:01,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:01,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:59:01,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:59:01,290 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 21 states. [2020-10-13 04:59:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:01,500 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2020-10-13 04:59:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:59:01,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-10-13 04:59:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:01,501 INFO L225 Difference]: With dead ends: 141 [2020-10-13 04:59:01,502 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:59:01,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:59:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:59:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-13 04:59:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:59:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-13 04:59:01,507 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 83 [2020-10-13 04:59:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:01,507 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-13 04:59:01,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:59:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-13 04:59:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:59:01,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:01,508 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:01,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:59:01,509 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash 164328670, now seen corresponding path program 18 times [2020-10-13 04:59:01,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:01,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494882814] [2020-10-13 04:59:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:01,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:06,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:06,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:59:06,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:06,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:59:06,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:59:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:59:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:59:06,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:06,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:06,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:06,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:06,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:06,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:06,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:06,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:06,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 04:59:06,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494882814] [2020-10-13 04:59:06,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:06,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:59:06,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017230811] [2020-10-13 04:59:06,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:59:06,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:06,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:59:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:59:06,791 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 22 states. [2020-10-13 04:59:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:06,991 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2020-10-13 04:59:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:59:06,992 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-10-13 04:59:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:06,994 INFO L225 Difference]: With dead ends: 147 [2020-10-13 04:59:06,994 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 04:59:06,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:59:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 04:59:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-13 04:59:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:59:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-13 04:59:06,999 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 87 [2020-10-13 04:59:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:06,999 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-13 04:59:07,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:59:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-13 04:59:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:59:07,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:07,001 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:07,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:59:07,001 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash -768457382, now seen corresponding path program 19 times [2020-10-13 04:59:07,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:07,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296344842] [2020-10-13 04:59:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:07,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:07,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:07,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:59:12,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:12,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:59:12,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:59:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:59:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:59:12,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:12,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:12,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:12,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:59:12,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:12,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 04:59:12,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296344842] [2020-10-13 04:59:12,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:12,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:59:12,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684669751] [2020-10-13 04:59:12,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:59:12,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:12,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:59:12,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:59:12,307 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 23 states. [2020-10-13 04:59:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:12,543 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-10-13 04:59:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:59:12,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-10-13 04:59:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:12,545 INFO L225 Difference]: With dead ends: 153 [2020-10-13 04:59:12,546 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 04:59:12,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:59:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 04:59:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-13 04:59:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:59:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-13 04:59:12,558 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 91 [2020-10-13 04:59:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:12,559 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-13 04:59:12,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:59:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-13 04:59:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:59:12,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:12,560 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:12,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:59:12,561 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1976920022, now seen corresponding path program 20 times [2020-10-13 04:59:12,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:12,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269608291] [2020-10-13 04:59:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:17,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:17,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:59:17,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:17,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:59:17,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:17,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:59:17,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:17,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:59:17,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:17,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:17,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:17,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:17,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:17,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:17,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:59:17,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:17,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 04:59:17,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269608291] [2020-10-13 04:59:17,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:17,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:59:17,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138096657] [2020-10-13 04:59:17,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:59:17,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:59:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:59:17,896 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 24 states. [2020-10-13 04:59:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:18,182 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2020-10-13 04:59:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:59:18,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 95 [2020-10-13 04:59:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:18,186 INFO L225 Difference]: With dead ends: 159 [2020-10-13 04:59:18,186 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 04:59:18,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:59:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 04:59:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-10-13 04:59:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:59:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-13 04:59:18,198 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 95 [2020-10-13 04:59:18,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:18,198 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-13 04:59:18,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:59:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-13 04:59:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:59:18,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:18,199 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:18,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:59:18,200 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1447044014, now seen corresponding path program 21 times [2020-10-13 04:59:18,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:18,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981724237] [2020-10-13 04:59:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:18,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:18,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:23,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:23,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:59:23,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:23,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:59:23,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:23,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:59:23,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:59:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:59:23,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:23,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:23,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:23,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:23,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:23,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:23,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:23,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:23,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:23,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:23,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:23,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:59:23,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981724237] [2020-10-13 04:59:23,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:23,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:59:23,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170721354] [2020-10-13 04:59:23,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:59:23,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:23,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:59:23,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:59:23,545 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 25 states. [2020-10-13 04:59:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:23,831 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2020-10-13 04:59:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:59:23,831 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2020-10-13 04:59:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:23,833 INFO L225 Difference]: With dead ends: 165 [2020-10-13 04:59:23,833 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 04:59:23,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:59:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 04:59:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-10-13 04:59:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:59:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-13 04:59:23,841 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 99 [2020-10-13 04:59:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:23,841 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-13 04:59:23,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:59:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-13 04:59:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 04:59:23,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:23,842 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:23,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:59:23,843 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -730029362, now seen corresponding path program 22 times [2020-10-13 04:59:23,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:23,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196669400] [2020-10-13 04:59:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:24,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:25,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:29,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:29,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 04:59:29,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:29,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5701 [2020-10-13 04:59:29,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:59:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:59:29,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:29,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:29,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:29,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:29,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:29,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:29,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:29,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:29,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 04:59:29,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196669400] [2020-10-13 04:59:29,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:29,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:59:29,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089027213] [2020-10-13 04:59:29,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:59:29,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:29,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:59:29,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:59:29,911 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 26 states. [2020-10-13 04:59:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:30,156 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2020-10-13 04:59:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:59:30,156 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 103 [2020-10-13 04:59:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:30,158 INFO L225 Difference]: With dead ends: 171 [2020-10-13 04:59:30,158 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 04:59:30,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:59:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 04:59:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-13 04:59:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:59:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-13 04:59:30,164 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 103 [2020-10-13 04:59:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:30,165 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-13 04:59:30,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:59:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-13 04:59:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:59:30,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:30,166 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:30,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:59:30,166 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:30,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:30,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1911112886, now seen corresponding path program 23 times [2020-10-13 04:59:30,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:30,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161418842] [2020-10-13 04:59:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:30,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:30,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:35,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:35,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:59:35,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:35,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5381 [2020-10-13 04:59:35,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:35,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:59:35,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:59:35,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:59:35,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:35,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:35,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:35,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:35,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:35,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:35,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:35,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:35,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:35,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:35,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:35,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 04:59:35,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161418842] [2020-10-13 04:59:35,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:35,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:59:35,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491262111] [2020-10-13 04:59:35,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:59:35,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:59:35,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:59:35,939 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 27 states. [2020-10-13 04:59:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:36,254 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2020-10-13 04:59:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:59:36,255 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 107 [2020-10-13 04:59:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:36,258 INFO L225 Difference]: With dead ends: 177 [2020-10-13 04:59:36,259 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 04:59:36,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:59:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 04:59:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-10-13 04:59:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:59:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-13 04:59:36,266 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 107 [2020-10-13 04:59:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:36,266 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-13 04:59:36,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:59:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-13 04:59:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:59:36,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:36,268 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:36,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:59:36,268 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:36,269 INFO L82 PathProgramCache]: Analyzing trace with hash 538518982, now seen corresponding path program 24 times [2020-10-13 04:59:36,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:36,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358115230] [2020-10-13 04:59:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:36,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:37,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:37,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:44,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:44,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:59:44,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:44,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8284 [2020-10-13 04:59:44,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:59:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:59:44,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:59:45,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:45,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:45,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:45,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:45,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:45,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:45,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:45,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:45,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:45,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 04:59:45,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358115230] [2020-10-13 04:59:45,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:45,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:59:45,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320461566] [2020-10-13 04:59:45,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:59:45,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:45,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:59:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:59:45,053 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 28 states. [2020-10-13 04:59:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:45,363 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2020-10-13 04:59:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:59:45,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2020-10-13 04:59:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:45,365 INFO L225 Difference]: With dead ends: 183 [2020-10-13 04:59:45,366 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 04:59:45,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:59:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 04:59:45,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-10-13 04:59:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:59:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-13 04:59:45,372 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 111 [2020-10-13 04:59:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:45,373 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-13 04:59:45,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:59:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-13 04:59:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 04:59:45,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:45,374 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:45,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:59:45,374 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:45,375 INFO L82 PathProgramCache]: Analyzing trace with hash 93250114, now seen corresponding path program 25 times [2020-10-13 04:59:45,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:45,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805123881] [2020-10-13 04:59:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:45,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:54,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:54,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 04:59:54,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:54,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8952 [2020-10-13 04:59:54,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:59:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:59:54,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:54,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:54,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:54,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:54,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:54,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:54,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:54,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:54,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:54,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:54,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:54,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 04:59:54,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805123881] [2020-10-13 04:59:54,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:54,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:59:54,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12357765] [2020-10-13 04:59:54,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:59:54,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:54,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:59:54,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:59:54,822 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 29 states. [2020-10-13 04:59:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:55,153 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2020-10-13 04:59:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:59:55,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-13 04:59:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:55,155 INFO L225 Difference]: With dead ends: 189 [2020-10-13 04:59:55,155 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 04:59:55,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:59:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 04:59:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-13 04:59:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:59:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-13 04:59:55,165 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 115 [2020-10-13 04:59:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:55,165 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-13 04:59:55,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:59:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-13 04:59:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:59:55,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:55,166 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:55,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:59:55,167 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:55,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1795354814, now seen corresponding path program 26 times [2020-10-13 04:59:55,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:55,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337366326] [2020-10-13 04:59:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:55,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:56,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:05,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:05,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 05:00:05,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:05,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9976 [2020-10-13 05:00:05,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:00:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 05:00:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:00:05,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:05,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:05,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:05,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:05,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:05,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:05,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:05,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:05,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 05:00:05,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337366326] [2020-10-13 05:00:05,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:05,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:00:05,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882284417] [2020-10-13 05:00:05,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:00:05,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:00:05,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:00:05,649 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 30 states. [2020-10-13 05:00:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:05,975 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2020-10-13 05:00:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:00:05,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 119 [2020-10-13 05:00:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:05,977 INFO L225 Difference]: With dead ends: 195 [2020-10-13 05:00:05,977 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 05:00:05,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:00:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 05:00:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-13 05:00:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 05:00:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-13 05:00:05,989 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 119 [2020-10-13 05:00:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:05,992 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-13 05:00:05,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:00:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-13 05:00:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 05:00:05,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:05,993 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:05,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:00:05,994 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:05,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1367322310, now seen corresponding path program 27 times [2020-10-13 05:00:05,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:05,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525998373] [2020-10-13 05:00:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:06,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:06,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:11,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:11,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 05:00:11,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:11,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 05:00:11,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:11,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:00:11,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 05:00:11,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:00:11,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:11,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:11,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:11,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:11,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:11,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:11,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 05:00:11,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525998373] [2020-10-13 05:00:11,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:11,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:00:11,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331587525] [2020-10-13 05:00:11,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:00:11,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:11,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:00:11,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:00:11,548 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 31 states. [2020-10-13 05:00:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:11,886 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2020-10-13 05:00:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:00:11,886 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 123 [2020-10-13 05:00:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:11,888 INFO L225 Difference]: With dead ends: 201 [2020-10-13 05:00:11,888 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 05:00:11,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:00:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 05:00:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-10-13 05:00:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 05:00:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-13 05:00:11,895 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 123 [2020-10-13 05:00:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:11,895 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-13 05:00:11,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:00:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-13 05:00:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 05:00:11,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:11,896 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:11,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:00:11,897 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash -544078922, now seen corresponding path program 28 times [2020-10-13 05:00:11,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:11,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514710838] [2020-10-13 05:00:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:11,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:16,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:16,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 05:00:16,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:16,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:00:16,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:00:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:00:16,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:17,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:17,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:17,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:17,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:17,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:17,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:00:17,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:17,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 05:00:17,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514710838] [2020-10-13 05:00:17,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:17,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:00:17,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498851592] [2020-10-13 05:00:17,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:00:17,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:17,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:00:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:00:17,443 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 32 states. [2020-10-13 05:00:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:17,721 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2020-10-13 05:00:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:00:17,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 127 [2020-10-13 05:00:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:17,723 INFO L225 Difference]: With dead ends: 207 [2020-10-13 05:00:17,723 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 05:00:17,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:00:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 05:00:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-10-13 05:00:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 05:00:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-10-13 05:00:17,731 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 127 [2020-10-13 05:00:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:17,731 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-10-13 05:00:17,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:00:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-10-13 05:00:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 05:00:17,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:17,732 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:17,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:00:17,733 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:17,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1061357618, now seen corresponding path program 29 times [2020-10-13 05:00:17,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:17,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950286267] [2020-10-13 05:00:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:17,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:19,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:35,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:35,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 05:00:35,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:35,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17674 [2020-10-13 05:00:35,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:35,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:00:35,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 05:00:35,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 05:00:35,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:35,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:35,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:35,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:35,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:35,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:35,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:35,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:35,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:35,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:35,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:35,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 05:00:35,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950286267] [2020-10-13 05:00:35,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:35,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:00:35,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053119214] [2020-10-13 05:00:35,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:00:35,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:35,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:00:35,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:00:35,995 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 33 states. [2020-10-13 05:00:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:36,381 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2020-10-13 05:00:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:00:36,381 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 131 [2020-10-13 05:00:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:36,383 INFO L225 Difference]: With dead ends: 213 [2020-10-13 05:00:36,383 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 05:00:36,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:00:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 05:00:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-10-13 05:00:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 05:00:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-10-13 05:00:36,390 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 131 [2020-10-13 05:00:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:36,390 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-10-13 05:00:36,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:00:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-10-13 05:00:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 05:00:36,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:36,392 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:36,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:00:36,392 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:36,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1071751506, now seen corresponding path program 30 times [2020-10-13 05:00:36,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:36,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644308670] [2020-10-13 05:00:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:38,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:39,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:53,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:53,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 05:00:53,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:53,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17496 [2020-10-13 05:00:53,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:53,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:00:53,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 05:00:53,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:00:53,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:54,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:54,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:54,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:54,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:54,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:54,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:54,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:54,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:54,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:54,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 05:00:54,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644308670] [2020-10-13 05:00:54,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:54,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:00:54,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971942193] [2020-10-13 05:00:54,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:00:54,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:54,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:00:54,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:00:54,512 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 34 states. [2020-10-13 05:00:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:54,854 INFO L93 Difference]: Finished difference Result 219 states and 224 transitions. [2020-10-13 05:00:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:00:54,854 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 135 [2020-10-13 05:00:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:54,855 INFO L225 Difference]: With dead ends: 219 [2020-10-13 05:00:54,855 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 05:00:54,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:00:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 05:00:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-10-13 05:00:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 05:00:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-10-13 05:00:54,861 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 135 [2020-10-13 05:00:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:54,862 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-10-13 05:00:54,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:00:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-10-13 05:00:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 05:00:54,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:54,863 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:54,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:00:54,863 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:54,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2043738326, now seen corresponding path program 31 times [2020-10-13 05:00:54,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:54,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711594097] [2020-10-13 05:00:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:54,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:54,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:59,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:59,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 05:00:59,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:59,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:00:59,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:00:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 05:00:59,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:00,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:00,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:00,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:00,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:00,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:00,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:01:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 05:01:00,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711594097] [2020-10-13 05:01:00,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:00,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:01:00,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715565478] [2020-10-13 05:01:00,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:01:00,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:00,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:01:00,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:01:00,658 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 35 states. [2020-10-13 05:01:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:01,112 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2020-10-13 05:01:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:01:01,113 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 139 [2020-10-13 05:01:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:01,114 INFO L225 Difference]: With dead ends: 225 [2020-10-13 05:01:01,114 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 05:01:01,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:01:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 05:01:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-10-13 05:01:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 05:01:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-10-13 05:01:01,121 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 139 [2020-10-13 05:01:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:01,122 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-10-13 05:01:01,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:01:01,122 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-10-13 05:01:01,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 05:01:01,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:01,123 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:01,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:01:01,123 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1728053670, now seen corresponding path program 32 times [2020-10-13 05:01:01,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:01,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965128365] [2020-10-13 05:01:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:01,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:03,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:04,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:22,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:22,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 05:01:22,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:22,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21735 [2020-10-13 05:01:22,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:22,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:01:22,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:22,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 05:01:22,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:23,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:23,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:23,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:23,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:23,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:23,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:23,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:23,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:23,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:23,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 05:01:23,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965128365] [2020-10-13 05:01:23,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:23,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:01:23,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609905594] [2020-10-13 05:01:23,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:01:23,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:01:23,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:01:23,730 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 36 states. [2020-10-13 05:01:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:24,147 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2020-10-13 05:01:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:01:24,148 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 143 [2020-10-13 05:01:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:24,149 INFO L225 Difference]: With dead ends: 231 [2020-10-13 05:01:24,149 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 05:01:24,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:01:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 05:01:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-13 05:01:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 05:01:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2020-10-13 05:01:24,155 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 143 [2020-10-13 05:01:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:24,156 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2020-10-13 05:01:24,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:01:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2020-10-13 05:01:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 05:01:24,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:24,157 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:24,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:01:24,157 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:24,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:24,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1771851298, now seen corresponding path program 33 times [2020-10-13 05:01:24,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:24,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512738183] [2020-10-13 05:01:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:24,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:27,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:28,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking...