/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/verifythis/elimination_max.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:55:54,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:55:54,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:55:54,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:55:54,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:55:54,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:55:54,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:55:54,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:55:54,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:55:54,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:55:54,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:55:54,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:55:54,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:55:54,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:55:54,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:55:54,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:55:54,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:55:54,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:55:54,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:55:54,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:55:54,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:55:54,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:55:54,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:55:54,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:55:54,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:55:54,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:55:54,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:55:54,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:55:54,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:55:54,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:55:54,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:55:54,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:55:54,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:55:54,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:55:54,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:55:54,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:55:54,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:55:54,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:55:54,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:55:54,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:55:54,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:55:54,366 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 15:55:54,388 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:55:54,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:55:54,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:55:54,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:55:54,390 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:55:54,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:55:54,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:55:54,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:55:54,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:55:54,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:55:54,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:55:54,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:55:54,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:55:54,392 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:55:54,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:55:54,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:55:54,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:55:54,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:55:54,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:55:54,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:55:54,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:55:54,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:55:54,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:55:54,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:55:54,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:55:54,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:55:54,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:55:54,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:55:54,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:55:54,395 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 15:55:54,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:55:54,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:55:54,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:55:54,731 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:55:54,731 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:55:54,732 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max.c [2020-10-13 15:55:54,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d385add6c/d9f7050d4fa94bca9bebcf1bf97287ae/FLAG491917087 [2020-10-13 15:55:55,296 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:55:55,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max.c [2020-10-13 15:55:55,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d385add6c/d9f7050d4fa94bca9bebcf1bf97287ae/FLAG491917087 [2020-10-13 15:55:55,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d385add6c/d9f7050d4fa94bca9bebcf1bf97287ae [2020-10-13 15:55:55,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:55:55,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:55:55,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:55:55,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:55:55,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:55:55,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:55:55" (1/1) ... [2020-10-13 15:55:55,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ba5b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:55, skipping insertion in model container [2020-10-13 15:55:55,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:55:55" (1/1) ... [2020-10-13 15:55:55,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:55:55,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:55:55,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:55:55,969 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:55:56,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:55:56,027 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:55:56,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56 WrapperNode [2020-10-13 15:55:56,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:55:56,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:55:56,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:55:56,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:55:56,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:55:56,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:55:56,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:55:56,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:55:56,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (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 15:55:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:55:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:55:56,245 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:55:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 15:55:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:55:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-13 15:55:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 15:55:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 15:55:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:55:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:55:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:55:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 15:55:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 15:55:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:55:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 15:55:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-13 15:55:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 15:55:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 15:55:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:55:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:55:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 15:55:56,544 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:55:56,544 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 15:55:56,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:55:56 BoogieIcfgContainer [2020-10-13 15:55:56,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:55:56,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:55:56,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:55:56,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:55:56,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:55:55" (1/3) ... [2020-10-13 15:55:56,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b78ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:55:56, skipping insertion in model container [2020-10-13 15:55:56,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56" (2/3) ... [2020-10-13 15:55:56,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b78ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:55:56, skipping insertion in model container [2020-10-13 15:55:56,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:55:56" (3/3) ... [2020-10-13 15:55:56,558 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2020-10-13 15:55:56,570 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:55:56,579 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:55:56,603 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:55:56,653 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:55:56,653 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:55:56,654 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:55:56,654 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:55:56,654 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:55:56,654 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:55:56,654 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:55:56,654 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:55:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-13 15:55:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 15:55:56,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:55:56,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:55:56,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:55:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:55:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash -233920769, now seen corresponding path program 1 times [2020-10-13 15:55:56,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:55:56,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664498505] [2020-10-13 15:55:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:55:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:56,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:57,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:57,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:57,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 15:55:57,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:55:57,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-13 15:55:57,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 15:55:57,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:57,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 15:55:57,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:55:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:57,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:57,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:57,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:55:57,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:55:57,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:55:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:57,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:55:57,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:55:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:57,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:57,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:57,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:57,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:55:57,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:55:57,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:55:57,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 15:55:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:57,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:57,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:55:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:57,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:57,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:57,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:55:57,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:57,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:55:57,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:57,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:57,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:55:57,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:57,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:57,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 15:55:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:57,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:57,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:57,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:55:57,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:57,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:55:57,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:57,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 15:55:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:57,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 15:55:57,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664498505] [2020-10-13 15:55:57,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:55:57,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:55:57,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529344726] [2020-10-13 15:55:57,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:55:57,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:55:57,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:55:57,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:55:57,578 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2020-10-13 15:55:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:55:57,751 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-13 15:55:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:55:57,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 15:55:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:55:57,763 INFO L225 Difference]: With dead ends: 71 [2020-10-13 15:55:57,764 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 15:55:57,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:55:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 15:55:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 15:55:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 15:55:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-13 15:55:57,819 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2020-10-13 15:55:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:55:57,819 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-13 15:55:57,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:55:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-13 15:55:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 15:55:57,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:55:57,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:55:57,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:55:57,823 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:55:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:55:57,824 INFO L82 PathProgramCache]: Analyzing trace with hash -620565569, now seen corresponding path program 1 times [2020-10-13 15:55:57,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:55:57,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134045786] [2020-10-13 15:55:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:55:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:57,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 15:55:58,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:55:58,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-13 15:55:58,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 15:55:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:55:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 15:55:58,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:58,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:55:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:55:58,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:58,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:55:58,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:55:58,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:58,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:55:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:55:58,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:58,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:55:58,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:55:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:58,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:55:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:55:58,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:58,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:55:58,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:55:58,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:55:58,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 15:55:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:55:58,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:58,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 15:55:58,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:55:58,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:55:58,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:55:58,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:55:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:55:58,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134045786] [2020-10-13 15:55:58,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:55:58,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 15:55:58,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513624190] [2020-10-13 15:55:58,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 15:55:58,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:55:58,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 15:55:58,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 15:55:58,746 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 12 states. [2020-10-13 15:55:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:55:59,265 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-10-13 15:55:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:55:59,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-13 15:55:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:55:59,268 INFO L225 Difference]: With dead ends: 51 [2020-10-13 15:55:59,268 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 15:55:59,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-13 15:55:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 15:55:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-13 15:55:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 15:55:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-13 15:55:59,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 29 [2020-10-13 15:55:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:55:59,285 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-13 15:55:59,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 15:55:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-13 15:55:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 15:55:59,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:55:59,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:55:59,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:55:59,287 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:55:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:55:59,287 INFO L82 PathProgramCache]: Analyzing trace with hash -997307294, now seen corresponding path program 1 times [2020-10-13 15:55:59,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:55:59,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190916679] [2020-10-13 15:55:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:55:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:59,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:59,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:59,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:59,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 15:55:59,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:55:59,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-13 15:55:59,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:59,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 15:55:59,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:55:59,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 15:55:59,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:00,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:00,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:00,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:00,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:00,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:00,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:00,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 15:56:00,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:00,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:00,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:00,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:00,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:00,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:00,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:00,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:00,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:00,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:00,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 15:56:00,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:00,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:00,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:00,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:00,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:00,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:00,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:00,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:00,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:00,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 15:56:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:00,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:00,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:00,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:00,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 15:56:00,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:00,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:00,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:00,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:56:00,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190916679] [2020-10-13 15:56:00,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:00,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 15:56:00,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194542943] [2020-10-13 15:56:00,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 15:56:00,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:00,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 15:56:00,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 15:56:00,216 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 14 states. [2020-10-13 15:56:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:01,025 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-10-13 15:56:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 15:56:01,025 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-13 15:56:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:01,027 INFO L225 Difference]: With dead ends: 70 [2020-10-13 15:56:01,027 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 15:56:01,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-13 15:56:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 15:56:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-13 15:56:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 15:56:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-13 15:56:01,038 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2020-10-13 15:56:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:01,039 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-13 15:56:01,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 15:56:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-13 15:56:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 15:56:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:01,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:01,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:56:01,041 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1584113308, now seen corresponding path program 1 times [2020-10-13 15:56:01,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:01,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272825672] [2020-10-13 15:56:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:01,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:01,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:01,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:01,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:01,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 15:56:01,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:56:01,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-13 15:56:01,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:01,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:01,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 15:56:01,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 15:56:01,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:01,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:01,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:01,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:01,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:01,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:01,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:01,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:01,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:01,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:01,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:01,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:01,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:01,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:01,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:01,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:01,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:01,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:01,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:01,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:01,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:01,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:01,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:01,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:56:01,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:56:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:01,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:01,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 15:56:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:01,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:01,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:01,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:01,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:01,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:01,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 15:56:01,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:01,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 15:56:01,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272825672] [2020-10-13 15:56:01,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:56:01,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 15:56:01,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067228727] [2020-10-13 15:56:01,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 15:56:01,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 15:56:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:56:01,575 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 8 states. [2020-10-13 15:56:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:01,747 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-13 15:56:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 15:56:01,748 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 15:56:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:01,751 INFO L225 Difference]: With dead ends: 66 [2020-10-13 15:56:01,751 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 15:56:01,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-13 15:56:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 15:56:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 15:56:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 15:56:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-13 15:56:01,760 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 31 [2020-10-13 15:56:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:01,760 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-13 15:56:01,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 15:56:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-13 15:56:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 15:56:01,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:01,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:01,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:56:01,762 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:01,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:01,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2026115141, now seen corresponding path program 2 times [2020-10-13 15:56:01,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:01,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366068512] [2020-10-13 15:56:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:01,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 15:56:02,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:02,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-13 15:56:02,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 15:56:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 15:56:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:02,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:02,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:02,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:02,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:02,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:02,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:02,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:02,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:02,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:02,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:02,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 15:56:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:02,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 15:56:02,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:02,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:02,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:56:02,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366068512] [2020-10-13 15:56:02,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:02,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 15:56:02,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194696518] [2020-10-13 15:56:02,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 15:56:02,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 15:56:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-13 15:56:02,816 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 16 states. [2020-10-13 15:56:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:04,127 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-10-13 15:56:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 15:56:04,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-13 15:56:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:04,128 INFO L225 Difference]: With dead ends: 76 [2020-10-13 15:56:04,128 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 15:56:04,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 15:56:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 15:56:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2020-10-13 15:56:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 15:56:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-13 15:56:04,145 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-13 15:56:04,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:04,149 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-13 15:56:04,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 15:56:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-13 15:56:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 15:56:04,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:04,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:04,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:56:04,151 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash -740129534, now seen corresponding path program 1 times [2020-10-13 15:56:04,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:04,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859828538] [2020-10-13 15:56:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:04,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:04,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 15:56:04,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-13 15:56:04,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:56:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 15:56:04,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:04,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:04,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:04,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:04,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:04,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:04,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:04,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:04,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:04,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:04,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:04,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:04,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:04,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:04,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:04,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:04,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:04,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:04,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:04,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:04,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:04,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:04,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:04,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:04,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 15:56:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:04,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:04,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:04,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:04,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:04,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:04,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:04,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 15:56:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:04,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:04,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:04,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 15:56:04,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859828538] [2020-10-13 15:56:04,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:56:04,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 15:56:04,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78648497] [2020-10-13 15:56:04,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 15:56:04,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:04,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 15:56:04,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 15:56:04,497 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 9 states. [2020-10-13 15:56:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:04,769 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-13 15:56:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:56:04,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 15:56:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:04,771 INFO L225 Difference]: With dead ends: 66 [2020-10-13 15:56:04,771 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 15:56:04,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-13 15:56:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 15:56:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-13 15:56:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 15:56:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-13 15:56:04,790 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 36 [2020-10-13 15:56:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:04,791 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-13 15:56:04,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 15:56:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-13 15:56:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 15:56:04,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:04,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:04,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:56:04,795 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash -157784216, now seen corresponding path program 3 times [2020-10-13 15:56:04,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:04,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635277292] [2020-10-13 15:56:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:04,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:05,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:05,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 15:56:05,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:05,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-13 15:56:05,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 15:56:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 15:56:05,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:05,932 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-13 15:56:06,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:06,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:06,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:06,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:06,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:06,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:06,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:06,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:06,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:06,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:06,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:06,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:06,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:06,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:06,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:06,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:06,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:06,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:06,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:06,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:06,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:06,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:06,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:06,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:06,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:06,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:06,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:06,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 15:56:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:06,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:06,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:06,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:06,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 15:56:06,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:06,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:06,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:06,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:06,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 15:56:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:56:06,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635277292] [2020-10-13 15:56:06,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:06,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 15:56:06,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917128030] [2020-10-13 15:56:06,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 15:56:06,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 15:56:06,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-13 15:56:06,267 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 18 states. [2020-10-13 15:56:07,353 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-13 15:56:07,826 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-13 15:56:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:08,485 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2020-10-13 15:56:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 15:56:08,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-13 15:56:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:08,490 INFO L225 Difference]: With dead ends: 93 [2020-10-13 15:56:08,491 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 15:56:08,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 15:56:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 15:56:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-13 15:56:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 15:56:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-10-13 15:56:08,505 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 35 [2020-10-13 15:56:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:08,505 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-10-13 15:56:08,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 15:56:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-10-13 15:56:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 15:56:08,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:08,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:08,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:56:08,507 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:08,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1121274113, now seen corresponding path program 1 times [2020-10-13 15:56:08,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:08,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771115656] [2020-10-13 15:56:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:08,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:08,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:08,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:08,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 15:56:08,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:08,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-13 15:56:08,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 15:56:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 15:56:08,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:08,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:08,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:08,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:08,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:08,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:08,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:08,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:08,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:08,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:08,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:08,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:08,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:08,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:08,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:08,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:08,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:08,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:08,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:08,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:08,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:08,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:08,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:08,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:08,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:08,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:08,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:08,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:08,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:08,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:08,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:08,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 15:56:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:08,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:08,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:08,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:08,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:08,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:08,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:08,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 15:56:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:08,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:08,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:08,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:08,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:08,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:08,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:08,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:08,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:08,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:08,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 15:56:08,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771115656] [2020-10-13 15:56:08,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:08,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 15:56:08,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620714221] [2020-10-13 15:56:08,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 15:56:08,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:08,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 15:56:08,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 15:56:08,984 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 12 states. [2020-10-13 15:56:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:09,505 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2020-10-13 15:56:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 15:56:09,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-13 15:56:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:09,507 INFO L225 Difference]: With dead ends: 93 [2020-10-13 15:56:09,508 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 15:56:09,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-13 15:56:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 15:56:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-13 15:56:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 15:56:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-10-13 15:56:09,523 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 38 [2020-10-13 15:56:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:09,524 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-10-13 15:56:09,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 15:56:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-10-13 15:56:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 15:56:09,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:09,525 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:09,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:56:09,526 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:09,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1353941451, now seen corresponding path program 4 times [2020-10-13 15:56:09,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:09,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207415384] [2020-10-13 15:56:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:09,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:09,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:10,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:10,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 15:56:10,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:10,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-13 15:56:10,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 15:56:10,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:10,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 15:56:10,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:10,919 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-13 15:56:11,108 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-13 15:56:11,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:11,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:11,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:11,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:11,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:11,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:11,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:11,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:11,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:11,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:11,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:11,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:11,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:11,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:11,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:11,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:11,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:11,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:11,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:11,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:11,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:11,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:11,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 15:56:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:11,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:11,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:11,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:11,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:11,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 15:56:11,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:11,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:11,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:11,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:11,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:56:11,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207415384] [2020-10-13 15:56:11,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:11,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 15:56:11,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606698858] [2020-10-13 15:56:11,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 15:56:11,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 15:56:11,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-13 15:56:11,330 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 20 states. [2020-10-13 15:56:11,873 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2020-10-13 15:56:12,499 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-13 15:56:12,941 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-13 15:56:13,410 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-13 15:56:13,704 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-13 15:56:14,160 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-13 15:56:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:14,664 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2020-10-13 15:56:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 15:56:14,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-13 15:56:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:14,669 INFO L225 Difference]: With dead ends: 110 [2020-10-13 15:56:14,669 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 15:56:14,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=370, Invalid=1886, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 15:56:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 15:56:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-13 15:56:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 15:56:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-13 15:56:14,683 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 37 [2020-10-13 15:56:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:14,684 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-13 15:56:14,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 15:56:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-13 15:56:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 15:56:14,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:14,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:14,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:56:14,686 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:14,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1965972924, now seen corresponding path program 2 times [2020-10-13 15:56:14,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:14,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842154495] [2020-10-13 15:56:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:14,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:14,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:15,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:15,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 15:56:15,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:56:15,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-13 15:56:15,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 15:56:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 15:56:15,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:15,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:15,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:15,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:15,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:15,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:15,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:15,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:15,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:15,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:15,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:15,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:15,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:15,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:15,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:15,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:15,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:15,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:15,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:15,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:15,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:15,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:15,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:15,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:15,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:15,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:15,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:15,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:15,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:15,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:15,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:15,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:15,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 15:56:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:15,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:15,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:15,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:15,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:15,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:15,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:15,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 15:56:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:15,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:15,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:15,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:15,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:15,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:15,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:15,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 15:56:15,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842154495] [2020-10-13 15:56:15,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:15,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 15:56:15,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396762181] [2020-10-13 15:56:15,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 15:56:15,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 15:56:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 15:56:15,658 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 14 states. [2020-10-13 15:56:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:16,439 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2020-10-13 15:56:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 15:56:16,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 15:56:16,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:16,441 INFO L225 Difference]: With dead ends: 101 [2020-10-13 15:56:16,441 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 15:56:16,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-10-13 15:56:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 15:56:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 57. [2020-10-13 15:56:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 15:56:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-13 15:56:16,453 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 40 [2020-10-13 15:56:16,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:16,454 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-13 15:56:16,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 15:56:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-13 15:56:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 15:56:16,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:16,455 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:16,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:56:16,456 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1871605906, now seen corresponding path program 5 times [2020-10-13 15:56:16,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:16,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875491175] [2020-10-13 15:56:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:16,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:16,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:17,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:17,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 15:56:17,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:17,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-13 15:56:17,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 15:56:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 15:56:17,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:17,633 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-13 15:56:17,788 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-13 15:56:17,992 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-13 15:56:18,200 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-13 15:56:18,559 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-13 15:56:18,966 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-13 15:56:19,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:19,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:19,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:19,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:19,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:19,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:19,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:19,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:19,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:19,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:19,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:19,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:19,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 15:56:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:19,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 15:56:19,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:19,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:56:19,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875491175] [2020-10-13 15:56:19,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:19,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 15:56:19,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736276948] [2020-10-13 15:56:19,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 15:56:19,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 15:56:19,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-10-13 15:56:19,220 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 22 states. [2020-10-13 15:56:20,002 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-13 15:56:20,458 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-13 15:56:20,991 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-13 15:56:21,533 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-13 15:56:21,742 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 15:56:22,079 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-10-13 15:56:22,320 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-13 15:56:22,608 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-10-13 15:56:22,897 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-13 15:56:23,246 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-13 15:56:23,516 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-13 15:56:23,863 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2020-10-13 15:56:24,094 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-13 15:56:24,411 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-10-13 15:56:24,724 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-13 15:56:25,084 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-10-13 15:56:25,377 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 65 [2020-10-13 15:56:25,951 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2020-10-13 15:56:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:26,266 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2020-10-13 15:56:26,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 15:56:26,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-10-13 15:56:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:26,270 INFO L225 Difference]: With dead ends: 127 [2020-10-13 15:56:26,270 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 15:56:26,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=489, Invalid=2373, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 15:56:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 15:56:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 59. [2020-10-13 15:56:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 15:56:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-10-13 15:56:26,305 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 39 [2020-10-13 15:56:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:26,306 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-10-13 15:56:26,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 15:56:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-10-13 15:56:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 15:56:26,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:26,309 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:26,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:56:26,310 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:26,310 INFO L82 PathProgramCache]: Analyzing trace with hash -656228271, now seen corresponding path program 6 times [2020-10-13 15:56:26,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:26,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772224511] [2020-10-13 15:56:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:26,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 15:56:27,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:27,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 969 [2020-10-13 15:56:27,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 15:56:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:56:27,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:27,733 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-13 15:56:27,906 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-13 15:56:28,220 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-13 15:56:28,421 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-13 15:56:28,714 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-13 15:56:29,015 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-13 15:56:29,588 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 62 [2020-10-13 15:56:30,314 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-10-13 15:56:30,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:30,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:30,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:30,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:30,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:30,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:30,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:30,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:30,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:30,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:30,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:30,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:30,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:30,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:30,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:30,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:30,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:30,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:30,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:30,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:30,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:30,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:30,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:30,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:30,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:30,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:30,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:30,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 15:56:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:30,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:30,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:30,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:30,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:30,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 15:56:30,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:30,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:56:30,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772224511] [2020-10-13 15:56:30,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:30,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 15:56:30,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843976127] [2020-10-13 15:56:30,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 15:56:30,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:30,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 15:56:30,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-13 15:56:30,642 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 24 states. [2020-10-13 15:56:31,644 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 64 [2020-10-13 15:56:32,152 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-13 15:56:32,722 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-10-13 15:56:32,997 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-13 15:56:33,389 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-10-13 15:56:33,549 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 15:56:33,719 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-13 15:56:34,141 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-13 15:56:34,393 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-13 15:56:34,925 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2020-10-13 15:56:35,261 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-13 15:56:35,612 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 64 [2020-10-13 15:56:36,092 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2020-10-13 15:56:36,380 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-13 15:56:36,798 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-13 15:56:37,201 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2020-10-13 15:56:37,715 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2020-10-13 15:56:38,087 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-13 15:56:38,438 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 67 [2020-10-13 15:56:38,916 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2020-10-13 15:56:39,234 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-13 15:56:39,674 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2020-10-13 15:56:40,086 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2020-10-13 15:56:40,846 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-10-13 15:56:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:41,266 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2020-10-13 15:56:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 15:56:41,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2020-10-13 15:56:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:41,269 INFO L225 Difference]: With dead ends: 140 [2020-10-13 15:56:41,269 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 15:56:41,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=643, Invalid=3139, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 15:56:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 15:56:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 61. [2020-10-13 15:56:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 15:56:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-10-13 15:56:41,285 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 41 [2020-10-13 15:56:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:41,285 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-10-13 15:56:41,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 15:56:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-10-13 15:56:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 15:56:41,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:41,286 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:41,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:56:41,287 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash -331504662, now seen corresponding path program 1 times [2020-10-13 15:56:41,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:41,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690891252] [2020-10-13 15:56:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:41,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 15:56:41,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:41,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-13 15:56:41,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:41,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:41,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:41,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 15:56:41,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:41,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:41,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:41,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:41,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:41,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:41,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:41,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:41,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:41,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:41,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:41,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:41,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:41,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:41,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:41,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:41,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:41,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:41,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:41,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:41,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:41,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:41,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:41,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 15:56:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:41,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:41,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:41,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:41,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 15:56:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:41,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:41,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:41,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:41,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:41,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:41,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 15:56:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:41,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:41,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:41,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:41,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:41,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:41,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:41,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:41,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:41,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 15:56:41,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690891252] [2020-10-13 15:56:41,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:56:41,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 15:56:41,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255687968] [2020-10-13 15:56:41,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 15:56:41,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:41,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 15:56:41,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:56:41,582 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 8 states. [2020-10-13 15:56:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:41,816 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-10-13 15:56:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 15:56:41,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-13 15:56:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:41,818 INFO L225 Difference]: With dead ends: 81 [2020-10-13 15:56:41,818 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 15:56:41,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-13 15:56:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 15:56:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 15:56:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 15:56:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-13 15:56:41,837 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 44 [2020-10-13 15:56:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:41,837 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-13 15:56:41,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 15:56:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-13 15:56:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 15:56:41,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:41,840 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:41,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 15:56:41,840 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash -909425548, now seen corresponding path program 7 times [2020-10-13 15:56:41,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:41,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454527586] [2020-10-13 15:56:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:41,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:41,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:43,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:43,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 15:56:43,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-13 15:56:43,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 15:56:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:56:43,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 15:56:43,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:43,608 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-13 15:56:43,954 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-13 15:56:44,227 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-13 15:56:44,597 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-13 15:56:45,008 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-13 15:56:45,548 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 53 [2020-10-13 15:56:46,103 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 61 [2020-10-13 15:56:46,855 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 60 [2020-10-13 15:56:47,500 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 56 [2020-10-13 15:56:47,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:47,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:47,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:47,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:47,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:47,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:47,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:47,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:47,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:47,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:47,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:47,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:47,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:47,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:47,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:47,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:47,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:47,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:47,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:47,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:47,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:47,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:47,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:47,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:47,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:47,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:47,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:47,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:47,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:47,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 15:56:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:47,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:47,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:47,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:47,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 15:56:47,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:47,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:47,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:47,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:47,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:56:47,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454527586] [2020-10-13 15:56:47,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:47,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 15:56:47,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467872445] [2020-10-13 15:56:47,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 15:56:47,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 15:56:47,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-10-13 15:56:47,834 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 26 states. [2020-10-13 15:56:48,637 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-13 15:56:49,188 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-13 15:56:49,775 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-13 15:56:50,082 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-13 15:56:50,430 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-13 15:56:50,590 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 15:56:50,806 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-13 15:56:51,229 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-13 15:56:51,443 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 15:56:51,710 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-13 15:56:52,179 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2020-10-13 15:56:52,458 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-13 15:56:52,730 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-13 15:56:53,156 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-13 15:56:53,602 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-13 15:56:54,168 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-10-13 15:56:54,563 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-10-13 15:56:54,914 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-10-13 15:56:55,446 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2020-10-13 15:56:55,694 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-13 15:56:56,129 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-10-13 15:56:56,613 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-13 15:56:57,138 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-13 15:56:57,550 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-10-13 15:56:57,909 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-10-13 15:56:58,451 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-10-13 15:56:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:59,663 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2020-10-13 15:56:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 15:56:59,667 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2020-10-13 15:56:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:59,669 INFO L225 Difference]: With dead ends: 142 [2020-10-13 15:56:59,669 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 15:56:59,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=699, Invalid=3461, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 15:56:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 15:56:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 63. [2020-10-13 15:56:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 15:56:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-13 15:56:59,688 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2020-10-13 15:56:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:59,688 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-13 15:56:59,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 15:56:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-13 15:56:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 15:56:59,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:59,689 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:59,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 15:56:59,690 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:59,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1369011993, now seen corresponding path program 1 times [2020-10-13 15:56:59,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:59,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013894622] [2020-10-13 15:56:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:59,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:59,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:00,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:00,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 15:57:00,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:57:00,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-13 15:57:00,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:00,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 15:57:00,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:57:00,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 15:57:00,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:00,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:57:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:00,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:00,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:00,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:57:00,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:00,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:00,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:00,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:00,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:00,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:00,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:57:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:00,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:00,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:00,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:00,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:00,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:00,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:00,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:00,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:57:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:00,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:00,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:00,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:57:00,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:00,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:00,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:00,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:00,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:00,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:00,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:00,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 15:57:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:00,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:00,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:00,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:00,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:00,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:57:00,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:57:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:57:00,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:00,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 15:57:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:00,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:00,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:00,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:00,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:57:00,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:57:00,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:00,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:57:00,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:00,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 15:57:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:00,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:00,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:00,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:00,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:57:00,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:00,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:57:00,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:57:00,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 15:57:00,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013894622] [2020-10-13 15:57:00,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:57:00,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 15:57:00,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10054410] [2020-10-13 15:57:00,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 15:57:00,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:57:00,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 15:57:00,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 15:57:00,277 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 11 states. [2020-10-13 15:57:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:57:00,943 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-10-13 15:57:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 15:57:00,944 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-13 15:57:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:57:00,946 INFO L225 Difference]: With dead ends: 86 [2020-10-13 15:57:00,946 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 15:57:00,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-13 15:57:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 15:57:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-13 15:57:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 15:57:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-13 15:57:00,980 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 46 [2020-10-13 15:57:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:57:00,980 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-13 15:57:00,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 15:57:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-13 15:57:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 15:57:00,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:57:00,981 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:57:00,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 15:57:00,982 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:57:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:57:00,982 INFO L82 PathProgramCache]: Analyzing trace with hash 581127127, now seen corresponding path program 8 times [2020-10-13 15:57:00,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:57:00,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848352312] [2020-10-13 15:57:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:57:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:01,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:02,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:02,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 15:57:02,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:57:02,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-13 15:57:02,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 15:57:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:57:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 15:57:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:02,789 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-13 15:57:02,990 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-13 15:57:03,239 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-13 15:57:03,513 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-13 15:57:03,812 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-13 15:57:04,261 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-13 15:57:04,782 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-13 15:57:05,333 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-13 15:57:05,906 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-13 15:57:06,728 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-10-13 15:57:07,563 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2020-10-13 15:57:08,565 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 72 [2020-10-13 15:57:10,099 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 187 DAG size of output: 69 [2020-10-13 15:57:10,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:57:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:10,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:10,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:10,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:57:10,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:10,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:10,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:10,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:10,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:10,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:10,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:10,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:57:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:10,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:10,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:10,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:10,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:10,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 15:57:10,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:10,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:10,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:10,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:57:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:10,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:10,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:57:10,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:10,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:10,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:10,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:10,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:10,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:10,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 15:57:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:10,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:10,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:10,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:10,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 15:57:10,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:57:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:10,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:57:10,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:57:10,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848352312] [2020-10-13 15:57:10,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:57:10,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 15:57:10,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842560579] [2020-10-13 15:57:10,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 15:57:10,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:57:10,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 15:57:10,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2020-10-13 15:57:10,497 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 28 states. [2020-10-13 15:57:11,595 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-13 15:57:12,329 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-10-13 15:57:12,533 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 36 [2020-10-13 15:57:12,705 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2020-10-13 15:57:13,251 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-10-13 15:57:13,419 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-13 15:57:13,646 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2020-10-13 15:57:14,239 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 86 [2020-10-13 15:57:14,458 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 47 [2020-10-13 15:57:14,784 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2020-10-13 15:57:15,473 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 93 [2020-10-13 15:57:15,988 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2020-10-13 15:57:16,364 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-13 15:57:17,156 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2020-10-13 15:57:17,654 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-13 15:57:18,142 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-13 15:57:19,006 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2020-10-13 15:57:19,444 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-13 15:57:20,191 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 91 [2020-10-13 15:57:21,182 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2020-10-13 15:57:21,875 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-13 15:57:22,465 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-10-13 15:57:23,391 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 94 [2020-10-13 15:57:23,912 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-13 15:57:24,479 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2020-10-13 15:57:25,408 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2020-10-13 15:57:26,194 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 94 [2020-10-13 15:57:27,254 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2020-10-13 15:57:27,940 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 88 [2020-10-13 15:57:28,610 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2020-10-13 15:57:29,559 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 97 [2020-10-13 15:57:29,988 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-13 15:57:30,613 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2020-10-13 15:57:31,757 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 101 [2020-10-13 15:57:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:57:33,853 INFO L93 Difference]: Finished difference Result 163 states and 204 transitions. [2020-10-13 15:57:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 15:57:33,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2020-10-13 15:57:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:57:33,858 INFO L225 Difference]: With dead ends: 163 [2020-10-13 15:57:33,858 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 15:57:33,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=875, Invalid=4237, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 15:57:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 15:57:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 88. [2020-10-13 15:57:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 15:57:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-13 15:57:33,901 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 45 [2020-10-13 15:57:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:57:33,901 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-13 15:57:33,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 15:57:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-13 15:57:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 15:57:33,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:57:33,902 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:57:33,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 15:57:33,902 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:57:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:57:33,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1981144412, now seen corresponding path program 2 times [2020-10-13 15:57:33,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:57:33,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727880929] [2020-10-13 15:57:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:57:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:33,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:33,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:34,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:34,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 15:57:34,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:57:34,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-13 15:57:34,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 15:57:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:57:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 15:57:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:34,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:57:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:34,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:34,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:34,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:57:34,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:34,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:34,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:34,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:34,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:34,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:34,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:57:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:34,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:34,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:34,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:34,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:34,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:34,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:34,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:34,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:57:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:34,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:34,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:34,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:57:34,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:34,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:34,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:34,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:34,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:34,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:34,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:34,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 15:57:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:34,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:34,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:34,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:34,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:34,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:57:34,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:34,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:57:34,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:34,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:57:34,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:34,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 15:57:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:34,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:34,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:57:34,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:57:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:57:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:34,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 15:57:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:34,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:34,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:34,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:34,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:57:34,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:57:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:57:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 15:57:34,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727880929] [2020-10-13 15:57:34,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:57:34,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 15:57:34,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013204250] [2020-10-13 15:57:34,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 15:57:34,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:57:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 15:57:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 15:57:34,542 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 14 states. [2020-10-13 15:57:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:57:36,040 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2020-10-13 15:57:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 15:57:36,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-13 15:57:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:57:36,044 INFO L225 Difference]: With dead ends: 117 [2020-10-13 15:57:36,045 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 15:57:36,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-13 15:57:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 15:57:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2020-10-13 15:57:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 15:57:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-13 15:57:36,064 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 48 [2020-10-13 15:57:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:57:36,064 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-13 15:57:36,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 15:57:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-13 15:57:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 15:57:36,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:57:36,065 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:57:36,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 15:57:36,065 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:57:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:57:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1516829062, now seen corresponding path program 9 times [2020-10-13 15:57:36,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:57:36,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842731296] [2020-10-13 15:57:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:57:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:36,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:36,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:36,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:36,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 15:57:36,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:57:36,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-10-13 15:57:36,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:36,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 15:57:36,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:57:36,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 15:57:36,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:37,611 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-13 15:57:37,872 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-13 15:57:38,236 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-13 15:57:38,633 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-13 15:57:39,109 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2020-10-13 15:57:39,610 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-13 15:57:40,474 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2020-10-13 15:57:41,284 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2020-10-13 15:57:42,455 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 115 DAG size of output: 58 [2020-10-13 15:57:43,655 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 121 DAG size of output: 64 [2020-10-13 15:57:45,411 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 137 DAG size of output: 70 [2020-10-13 15:57:47,236 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 145 DAG size of output: 78 [2020-10-13 15:57:49,659 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 224 DAG size of output: 74 [2020-10-13 15:57:52,091 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 207 DAG size of output: 70 [2020-10-13 15:57:52,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:57:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:52,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:52,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:52,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:57:52,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:52,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:52,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:52,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:52,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:57:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:52,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:52,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:52,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:52,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:52,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:52,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:57:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:52,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:52,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:57:52,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:57:52,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:57:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:57:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:52,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 15:57:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:57:52,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:57:52,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:57:52,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:57:52,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:57:52,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 15:57:52,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:57:52,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:57:52,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:57:52,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:57:52,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:57:52,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842731296] [2020-10-13 15:57:52,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:57:52,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 15:57:52,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703187757] [2020-10-13 15:57:52,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 15:57:52,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:57:52,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 15:57:52,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2020-10-13 15:57:52,568 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 30 states. [2020-10-13 15:57:53,542 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 28 [2020-10-13 15:57:54,156 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 39 [2020-10-13 15:57:54,325 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-13 15:57:54,517 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-10-13 15:57:54,843 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-10-13 15:57:55,027 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-10-13 15:57:55,251 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2020-10-13 15:57:55,777 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-10-13 15:57:56,137 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-13 15:57:56,440 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-13 15:57:57,010 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2020-10-13 15:57:57,300 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 15:57:57,676 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-13 15:57:58,712 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2020-10-13 15:57:59,079 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-13 15:57:59,554 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-13 15:58:00,602 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-13 15:58:01,017 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-13 15:58:01,700 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-13 15:58:03,047 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-13 15:58:03,748 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-13 15:58:04,405 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-13 15:58:04,847 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2020-10-13 15:58:06,173 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2020-10-13 15:58:06,524 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 33 [2020-10-13 15:58:07,270 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 66 [2020-10-13 15:58:08,820 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2020-10-13 15:58:09,581 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2020-10-13 15:58:10,058 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 49 [2020-10-13 15:58:11,370 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2020-10-13 15:58:12,026 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-13 15:58:12,420 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2020-10-13 15:58:13,514 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-13 15:58:13,827 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 36 [2020-10-13 15:58:14,509 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2020-10-13 15:58:15,840 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2020-10-13 15:58:16,522 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2020-10-13 15:58:17,052 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 52 [2020-10-13 15:58:18,278 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2020-10-13 15:58:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:58:20,215 INFO L93 Difference]: Finished difference Result 184 states and 230 transitions. [2020-10-13 15:58:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 15:58:20,218 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 47 [2020-10-13 15:58:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:58:20,221 INFO L225 Difference]: With dead ends: 184 [2020-10-13 15:58:20,221 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 15:58:20,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=1065, Invalid=4941, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 15:58:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 15:58:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 90. [2020-10-13 15:58:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 15:58:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2020-10-13 15:58:20,243 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 47 [2020-10-13 15:58:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:58:20,243 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2020-10-13 15:58:20,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 15:58:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2020-10-13 15:58:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 15:58:20,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:58:20,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:58:20,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 15:58:20,244 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:58:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:58:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1829879519, now seen corresponding path program 3 times [2020-10-13 15:58:20,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:58:20,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122781253] [2020-10-13 15:58:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:58:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:20,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:20,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:20,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 15:58:20,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:58:20,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-13 15:58:20,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 15:58:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:58:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 15:58:20,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:58:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:20,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:20,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:20,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:58:20,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:20,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:58:20,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:20,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:20,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:58:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:20,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:20,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:20,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:20,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 15:58:20,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:20,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:21,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:58:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:21,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:21,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:58:21,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:21,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 15:58:21,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:21,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:21,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:21,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:21,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:21,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 15:58:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:21,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:21,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:21,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:21,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:58:21,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:21,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:58:21,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:21,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:58:21,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:21,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 15:58:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:21,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:21,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:21,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:21,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:58:21,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:21,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:58:21,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:21,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:58:21,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:21,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 15:58:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:21,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:21,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:21,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:58:21,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:58:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:58:21,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 15:58:21,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122781253] [2020-10-13 15:58:21,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:58:21,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 15:58:21,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865111613] [2020-10-13 15:58:21,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 15:58:21,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:58:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 15:58:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-13 15:58:21,045 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand 16 states. [2020-10-13 15:58:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:58:23,059 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2020-10-13 15:58:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 15:58:23,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-13 15:58:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:58:23,063 INFO L225 Difference]: With dead ends: 127 [2020-10-13 15:58:23,064 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 15:58:23,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2020-10-13 15:58:23,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 15:58:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2020-10-13 15:58:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 15:58:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-10-13 15:58:23,080 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 50 [2020-10-13 15:58:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:58:23,080 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-10-13 15:58:23,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 15:58:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-10-13 15:58:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 15:58:23,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:58:23,081 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:58:23,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 15:58:23,081 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:58:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:58:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 981902429, now seen corresponding path program 10 times [2020-10-13 15:58:23,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:58:23,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035804888] [2020-10-13 15:58:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:58:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:23,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:23,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:23,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:23,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 15:58:23,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:58:23,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-13 15:58:23,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 15:58:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:58:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:58:23,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:24,774 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-13 15:58:24,981 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-13 15:58:25,214 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-13 15:58:25,688 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-13 15:58:26,236 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-13 15:58:26,902 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 15:58:27,622 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-13 15:58:28,698 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 51 [2020-10-13 15:58:29,787 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 57 [2020-10-13 15:58:31,186 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 141 DAG size of output: 56 [2020-10-13 15:58:32,653 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 147 DAG size of output: 62 [2020-10-13 15:58:34,381 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 175 DAG size of output: 59 [2020-10-13 15:58:36,236 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 181 DAG size of output: 65 [2020-10-13 15:58:39,231 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 213 DAG size of output: 67 [2020-10-13 15:58:42,445 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 221 DAG size of output: 75 [2020-10-13 15:58:46,406 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 266 DAG size of output: 81 [2020-10-13 15:58:50,942 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 285 DAG size of output: 81 [2020-10-13 15:58:51,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:58:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:51,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:51,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:51,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:58:51,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:51,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:58:51,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:51,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:51,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:51,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:51,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:51,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:58:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:51,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:51,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:51,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:51,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:51,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 15:58:51,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:51,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:51,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:51,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:51,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:51,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:58:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:51,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:51,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:51,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:58:51,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:51,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:58:51,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:51,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:51,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:51,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:51,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:51,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 15:58:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:51,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:51,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:51,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:51,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:51,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 15:58:51,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:51,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:58:51,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:51,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:58:51,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 3 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 15:58:51,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035804888] [2020-10-13 15:58:51,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:58:51,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 15:58:51,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054816508] [2020-10-13 15:58:51,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 15:58:51,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:58:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 15:58:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-10-13 15:58:51,514 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 32 states. [2020-10-13 15:58:53,528 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 85 [2020-10-13 15:58:53,936 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 32 [2020-10-13 15:58:55,119 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 125 DAG size of output: 92 [2020-10-13 15:58:55,318 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2020-10-13 15:58:55,634 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2020-10-13 15:58:57,098 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 127 DAG size of output: 97 [2020-10-13 15:58:57,400 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-13 15:58:57,908 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2020-10-13 15:58:59,974 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 129 DAG size of output: 95 [2020-10-13 15:59:00,501 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-13 15:59:01,008 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2020-10-13 15:59:02,514 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 125 DAG size of output: 94 [2020-10-13 15:59:02,952 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-13 15:59:03,452 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-10-13 15:59:05,137 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 127 DAG size of output: 98 [2020-10-13 15:59:05,665 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-13 15:59:06,265 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-13 15:59:08,001 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 127 DAG size of output: 101 [2020-10-13 15:59:08,654 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-13 15:59:09,422 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-13 15:59:11,083 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2020-10-13 15:59:12,156 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-13 15:59:13,004 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-13 15:59:14,872 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 123 DAG size of output: 107 [2020-10-13 15:59:16,008 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-13 15:59:17,026 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 15:59:18,760 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 132 DAG size of output: 102 [2020-10-13 15:59:21,119 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-13 15:59:22,549 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 130 DAG size of output: 97 [2020-10-13 15:59:24,703 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 132 DAG size of output: 103 [2020-10-13 15:59:26,776 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 128 DAG size of output: 112 [2020-10-13 15:59:28,125 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 125 DAG size of output: 90 [2020-10-13 15:59:30,097 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 130 DAG size of output: 99 [2020-10-13 15:59:32,391 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 134 DAG size of output: 100 [2020-10-13 15:59:34,718 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 131 DAG size of output: 108 [2020-10-13 15:59:36,080 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:59:37,831 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 135 DAG size of output: 105 [2020-10-13 15:59:40,239 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 135 DAG size of output: 109 [2020-10-13 15:59:41,874 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 133 DAG size of output: 100 [2020-10-13 15:59:43,974 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 135 DAG size of output: 106 [2020-10-13 15:59:46,399 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 131 DAG size of output: 115 [2020-10-13 15:59:48,134 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2020-10-13 15:59:50,209 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 133 DAG size of output: 102 [2020-10-13 15:59:52,965 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 137 DAG size of output: 103 [2020-10-13 15:59:55,760 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 134 DAG size of output: 111 [2020-10-13 15:59:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:59:59,871 INFO L93 Difference]: Finished difference Result 230 states and 291 transitions. [2020-10-13 15:59:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 15:59:59,875 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 49 [2020-10-13 15:59:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:59:59,878 INFO L225 Difference]: With dead ends: 230 [2020-10-13 15:59:59,878 INFO L226 Difference]: Without dead ends: 228 [2020-10-13 15:59:59,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 88.6s TimeCoverageRelationStatistics Valid=1283, Invalid=5857, Unknown=0, NotChecked=0, Total=7140 [2020-10-13 15:59:59,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-13 15:59:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 77. [2020-10-13 15:59:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 15:59:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2020-10-13 15:59:59,902 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 49 [2020-10-13 15:59:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:59:59,903 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2020-10-13 15:59:59,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 15:59:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2020-10-13 15:59:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 15:59:59,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:59:59,904 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:59:59,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 15:59:59,904 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:59:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:59:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1900409551, now seen corresponding path program 4 times [2020-10-13 15:59:59,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:59:59,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632174687] [2020-10-13 15:59:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:59:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:59:59,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:59,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:00,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:00,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 16:00:00,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 16:00:00,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-13 16:00:00,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:00,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 16:00:00,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 16:00:00,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 16:00:00,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 16:00:00,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 16:00:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 16:00:00,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:00,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:00,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 16:00:00,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 16:00:00,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 16:00:00,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 16:00:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 16:00:00,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 16:00:00,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 16:00:00,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 16:00:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 16:00:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:00,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:00,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 16:00:00,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 16:00:00,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 16:00:00,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 16:00:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 16:00:00,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 16:00:00,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 16:00:00,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 16:00:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 16:00:00,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:00,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:00,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 16:00:00,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 16:00:00,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 16:00:00,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 16:00:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 16:00:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 16:00:00,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 16:00:00,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 16:00:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 16:00:00,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:00,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:00,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 16:00:00,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 16:00:00,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 16:00:00,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 16:00:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 16:00:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 16:00:00,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 16:00:00,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 16:00:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 16:00:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:00,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:00,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 16:00:00,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 16:00:00,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 16:00:00,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:00,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 16:00:00,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 16:00:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 16:00:00,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 16:00:00,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 16:00:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 16:00:00,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:00,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:00,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 16:00:00,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 16:00:00,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 16:00:00,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:00,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 16:00:00,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 16:00:00,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 16:00:00,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 16:00:00,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 16:00:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 16:00:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:00,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:00,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 16:00:00,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 16:00:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 16:00:00,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 16:00:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 16:00:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 16:00:00,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 16:00:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 16:00:00,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632174687] [2020-10-13 16:00:00,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 16:00:00,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 16:00:00,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562870685] [2020-10-13 16:00:00,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 16:00:00,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 16:00:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 16:00:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 16:00:00,480 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 10 states. [2020-10-13 16:00:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 16:00:01,309 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2020-10-13 16:00:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 16:00:01,309 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-13 16:00:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 16:00:01,310 INFO L225 Difference]: With dead ends: 101 [2020-10-13 16:00:01,310 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 16:00:01,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-13 16:00:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 16:00:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 16:00:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 16:00:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-13 16:00:01,325 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 54 [2020-10-13 16:00:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 16:00:01,325 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-13 16:00:01,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 16:00:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-13 16:00:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 16:00:01,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 16:00:01,326 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 16:00:01,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 16:00:01,327 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 16:00:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 16:00:01,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1376146816, now seen corresponding path program 11 times [2020-10-13 16:00:01,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 16:00:01,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042495327] [2020-10-13 16:00:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 16:00:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 16:00:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:01,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 16:00:02,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 16:00:02,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 16:00:02,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 16:00:02,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-13 16:00:02,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 16:00:02,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 16:00:02,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 16:00:02,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 16:00:02,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 16:00:03,228 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-13 16:00:03,450 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-13 16:00:03,851 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-13 16:00:04,262 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-13 16:00:05,087 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37