/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:35:08,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:35:08,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:35:08,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:35:08,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:35:08,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:35:08,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:35:08,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:35:08,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:35:08,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:35:08,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:35:08,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:35:08,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:35:08,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:35:08,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:35:08,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:35:08,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:35:08,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:35:08,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:35:08,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:35:08,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:35:08,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:35:08,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:35:08,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:35:08,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:35:08,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:35:08,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:35:08,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:35:08,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:35:08,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:35:08,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:35:08,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:35:08,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:35:08,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:35:08,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:35:08,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:35:08,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:35:08,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:35:08,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:35:08,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:35:08,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:35:08,709 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 [2020-10-27 20:35:08,738 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:35:08,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:35:08,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:35:08,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:35:08,740 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:35:08,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:35:08,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:35:08,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:35:08,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:35:08,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:35:08,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:35:08,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:35:08,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:35:08,743 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:35:08,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:35:08,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:35:08,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:35:08,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:35:08,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:35:08,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:35:08,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:35:08,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:35:08,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:35:08,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:35:08,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:35:08,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:35:08,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:35:08,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:35:08,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:35:08,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:35:09,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:35:09,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:35:09,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:35:09,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:35:09,196 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:35:09,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2020-10-27 20:35:09,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d673ce64/37c689e0ffd04e5692642d9b367802ff/FLAG8f9a5792c [2020-10-27 20:35:09,921 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:35:09,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/linear_sea.ch.c [2020-10-27 20:35:09,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d673ce64/37c689e0ffd04e5692642d9b367802ff/FLAG8f9a5792c [2020-10-27 20:35:10,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d673ce64/37c689e0ffd04e5692642d9b367802ff [2020-10-27 20:35:10,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:35:10,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:35:10,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:35:10,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:35:10,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:35:10,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74421ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10, skipping insertion in model container [2020-10-27 20:35:10,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:35:10,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:35:10,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:35:10,486 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:35:10,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:35:10,527 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:35:10,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10 WrapperNode [2020-10-27 20:35:10,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:35:10,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:35:10,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:35:10,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:35:10,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (1/1) ... [2020-10-27 20:35:10,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:35:10,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:35:10,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:35:10,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:35:10,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (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 [2020-10-27 20:35:10,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:35:10,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:35:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:35:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:35:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2020-10-27 20:35:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:35:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:35:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:35:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:35:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:35:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:35:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:35:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:35:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2020-10-27 20:35:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:35:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:35:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:35:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:35:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:35:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:35:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:35:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:35:11,123 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:35:11,124 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:35:11,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:35:11 BoogieIcfgContainer [2020-10-27 20:35:11,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:35:11,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:35:11,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:35:11,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:35:11,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:35:10" (1/3) ... [2020-10-27 20:35:11,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7fe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:35:11, skipping insertion in model container [2020-10-27 20:35:11,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:10" (2/3) ... [2020-10-27 20:35:11,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7fe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:35:11, skipping insertion in model container [2020-10-27 20:35:11,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:35:11" (3/3) ... [2020-10-27 20:35:11,144 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2020-10-27 20:35:11,159 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:35:11,165 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:35:11,179 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:35:11,214 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:35:11,214 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:35:11,214 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:35:11,214 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:35:11,214 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:35:11,215 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:35:11,215 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:35:11,215 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:35:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-27 20:35:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:35:11,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:11,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:11,242 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:11,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1066478455, now seen corresponding path program 1 times [2020-10-27 20:35:11,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:11,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020836697] [2020-10-27 20:35:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:11,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:11,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:12,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:12,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:35:12,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:12,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-27 20:35:12,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:35:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:12,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 20:35:12,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:12,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:12,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:12,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:12,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:12,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:35:12,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:12,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:35:12,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:12,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:12,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:12,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:35:12,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:12,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 20:35:12,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:12,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:12,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:35:12,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:12,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:35:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:12,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020836697] [2020-10-27 20:35:12,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:12,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:35:12,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112457114] [2020-10-27 20:35:12,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:35:12,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:35:12,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:35:12,515 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2020-10-27 20:35:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:12,735 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-27 20:35:12,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:35:12,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:35:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:12,744 INFO L225 Difference]: With dead ends: 49 [2020-10-27 20:35:12,745 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:35:12,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:35:12,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 20:35:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:35:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-27 20:35:12,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-27 20:35:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:12,793 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-27 20:35:12,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:35:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-27 20:35:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:35:12,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:12,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:12,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:35:12,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:12,796 INFO L82 PathProgramCache]: Analyzing trace with hash 200667792, now seen corresponding path program 1 times [2020-10-27 20:35:12,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:12,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128551296] [2020-10-27 20:35:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:12,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:13,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:13,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:35:13,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:13,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 20:35:13,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:13,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:13,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:35:13,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:13,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:13,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:13,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:13,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:13,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:13,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:13,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:35:13,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:13,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:13,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:13,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:13,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:13,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:35:13,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:13,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 20:35:13,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:13,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:13,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:13,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:35:13,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:13,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128551296] [2020-10-27 20:35:13,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:13,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:35:13,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753730717] [2020-10-27 20:35:13,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:13,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:13,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:13,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:13,264 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2020-10-27 20:35:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:13,620 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-27 20:35:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:35:13,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:35:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:13,622 INFO L225 Difference]: With dead ends: 31 [2020-10-27 20:35:13,622 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:35:13,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:35:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:35:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 20:35:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:35:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 20:35:13,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2020-10-27 20:35:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:13,640 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 20:35:13,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 20:35:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:35:13,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:13,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:13,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:35:13,642 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:13,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1606786671, now seen corresponding path program 1 times [2020-10-27 20:35:13,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:13,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525284588] [2020-10-27 20:35:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:13,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:13,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:13,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:14,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:35:14,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:14,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-27 20:35:14,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:35:14,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:14,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:14,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:14,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:14,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:14,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:14,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:14,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:14,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:14,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:14,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:14,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:14,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:14,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:35:14,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:14,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 20:35:14,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:14,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:14,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:14,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:14,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525284588] [2020-10-27 20:35:14,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:14,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:35:14,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272608827] [2020-10-27 20:35:14,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:14,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:14,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:14,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:14,654 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-10-27 20:35:14,847 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-27 20:35:14,981 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-27 20:35:15,192 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-27 20:35:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:15,265 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-27 20:35:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:35:15,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:35:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:15,269 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:35:15,269 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:35:15,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:35:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:35:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-27 20:35:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:35:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 20:35:15,280 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-27 20:35:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:15,280 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 20:35:15,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:15,281 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 20:35:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:35:15,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:15,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:15,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:35:15,282 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:15,283 INFO L82 PathProgramCache]: Analyzing trace with hash -905722093, now seen corresponding path program 1 times [2020-10-27 20:35:15,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:15,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407179876] [2020-10-27 20:35:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:15,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:15,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:15,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:15,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:15,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:15,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:35:15,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:35:15,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-27 20:35:15,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:35:15,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:16,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:16,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:16,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:16,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:16,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:16,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:16,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:16,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:16,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:16,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:16,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:16,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:16,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:16,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:35:16,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:16,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 20:35:16,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:16,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:16,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407179876] [2020-10-27 20:35:16,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:16,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:35:16,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490094429] [2020-10-27 20:35:16,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:16,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:16,280 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-27 20:35:16,930 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-27 20:35:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:17,041 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-27 20:35:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:35:17,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:35:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:17,043 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:35:17,043 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:35:17,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:35:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:35:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 20:35:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:35:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 20:35:17,056 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2020-10-27 20:35:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:17,056 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 20:35:17,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 20:35:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:35:17,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:17,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:17,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:35:17,064 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2123186805, now seen corresponding path program 1 times [2020-10-27 20:35:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:17,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502951814] [2020-10-27 20:35:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:17,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:17,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:17,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:35:17,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:17,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-27 20:35:17,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:17,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:35:17,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:17,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:17,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:17,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:17,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:17,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:17,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:17,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:17,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:17,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:17,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:17,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:35:17,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:17,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 20:35:17,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:35:17,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:35:18,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502951814] [2020-10-27 20:35:18,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:18,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:35:18,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131297524] [2020-10-27 20:35:18,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:18,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:18,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:18,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:18,011 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-10-27 20:35:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:18,400 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-10-27 20:35:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:35:18,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 20:35:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:18,402 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:35:18,402 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:35:18,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:35:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:35:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 20:35:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:35:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 20:35:18,410 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2020-10-27 20:35:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:18,411 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 20:35:18,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 20:35:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:35:18,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:18,412 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:18,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:35:18,413 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1422122227, now seen corresponding path program 1 times [2020-10-27 20:35:18,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:18,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848382575] [2020-10-27 20:35:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:18,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:18,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:18,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:35:19,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:19,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-10-27 20:35:19,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:19,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:35:19,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:19,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:19,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:19,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:19,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:19,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:19,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:19,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:35:19,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:19,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 20:35:19,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:35:19,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:20,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848382575] [2020-10-27 20:35:20,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:20,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:20,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788653632] [2020-10-27 20:35:20,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:20,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:20,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:20,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:20,134 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-10-27 20:35:20,644 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 20:35:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:20,968 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-27 20:35:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:35:20,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 20:35:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:20,970 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:35:20,970 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:35:20,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:35:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:35:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 20:35:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:35:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-27 20:35:20,979 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-10-27 20:35:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:20,979 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-27 20:35:20,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-27 20:35:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:35:20,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:20,980 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:20,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:35:20,981 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:20,981 INFO L82 PathProgramCache]: Analyzing trace with hash -925659949, now seen corresponding path program 2 times [2020-10-27 20:35:20,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:20,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607536515] [2020-10-27 20:35:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:22,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:35:22,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:22,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-10-27 20:35:22,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:35:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:35:22,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:22,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:22,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:22,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:22,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:35:22,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:22,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:22,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:22,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:22,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:22,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:23,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:23,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:35:23,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:23,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-27 20:35:23,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:23,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:35:23,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:23,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:35:23,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:35:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:23,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607536515] [2020-10-27 20:35:23,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:23,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:35:23,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092929359] [2020-10-27 20:35:23,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:35:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:35:23,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:35:23,961 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-10-27 20:35:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:24,529 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-27 20:35:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:35:24,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 20:35:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:24,531 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:35:24,532 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:35:24,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:35:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:35:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-27 20:35:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:35:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 20:35:24,541 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-27 20:35:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:24,542 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 20:35:24,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:35:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 20:35:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:35:24,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:24,543 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:24,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:35:24,543 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:24,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1609663821, now seen corresponding path program 3 times [2020-10-27 20:35:24,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:24,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545464149] [2020-10-27 20:35:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:27,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:27,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:35:27,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:27,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2434 [2020-10-27 20:35:27,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:35:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:35:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:27,166 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 24 [2020-10-27 20:35:27,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:27,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:27,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:27,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:27,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:27,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:27,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:27,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:27,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:27,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:27,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:27,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:27,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:27,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:35:27,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:27,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-27 20:35:27,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:27,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:35:27,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:27,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:35:27,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:28,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545464149] [2020-10-27 20:35:28,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:28,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:35:28,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559727091] [2020-10-27 20:35:28,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:35:28,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:35:28,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:35:28,147 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-27 20:35:28,543 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 20:35:28,969 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-27 20:35:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:29,073 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-27 20:35:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:35:29,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 20:35:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:29,075 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:35:29,075 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:35:29,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:35:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:35:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-27 20:35:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:35:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-27 20:35:29,085 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-10-27 20:35:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:29,086 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-27 20:35:29,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:35:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-27 20:35:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:35:29,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:29,087 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:29,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:35:29,088 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:29,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:29,088 INFO L82 PathProgramCache]: Analyzing trace with hash 145228435, now seen corresponding path program 4 times [2020-10-27 20:35:29,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:29,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781919326] [2020-10-27 20:35:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:29,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:30,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:30,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:34,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:35:34,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:35:34,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 20:35:34,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:35:34,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:34,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:35:34,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:34,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:34,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:34,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:34,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:34,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:34,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:34,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:34,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:39,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:35:39,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:35:39,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:35:39,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:39,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:35:39,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:39,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:35:39,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:39,852 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-27 20:35:40,066 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-10-27 20:35:40,311 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 65 [2020-10-27 20:35:40,702 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 84 [2020-10-27 20:35:41,055 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-27 20:35:43,488 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-10-27 20:35:43,833 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-27 20:35:44,069 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-27 20:35:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:44,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781919326] [2020-10-27 20:35:44,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:44,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:35:44,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210248358] [2020-10-27 20:35:44,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:35:44,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:44,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:35:44,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:35:44,108 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 14 states. [2020-10-27 20:35:44,763 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-27 20:35:45,225 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2020-10-27 20:35:45,641 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 93 [2020-10-27 20:35:47,981 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 20:35:48,271 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 20:35:55,104 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 146 DAG size of output: 140 [2020-10-27 20:35:57,528 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 20:36:08,495 WARN L193 SmtUtils]: Spent 8.77 s on a formula simplification. DAG size of input: 143 DAG size of output: 137 [2020-10-27 20:36:11,149 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 144 DAG size of output: 139 [2020-10-27 20:36:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:15,498 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-27 20:36:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:36:15,499 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 20:36:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:15,501 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:36:15,501 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:36:15,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=107, Invalid=541, Unknown=2, NotChecked=0, Total=650 [2020-10-27 20:36:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:36:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2020-10-27 20:36:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:36:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 20:36:15,511 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 33 [2020-10-27 20:36:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:15,512 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 20:36:15,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:36:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 20:36:15,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:36:15,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:15,513 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:15,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:36:15,513 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:15,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:15,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1443119467, now seen corresponding path program 5 times [2020-10-27 20:36:15,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:15,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757606966] [2020-10-27 20:36:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:15,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:15,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:16,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:18,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:18,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:36:18,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:36:18,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3367 [2020-10-27 20:36:18,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:18,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:36:18,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:36:18,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:36:18,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:18,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:18,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:18,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:18,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:18,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:36:18,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:18,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:36:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:18,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:19,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:19,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:36:19,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:19,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 20:36:19,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:36:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-27 20:36:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:36:19,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:36:19,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757606966] [2020-10-27 20:36:19,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:19,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:36:19,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363982396] [2020-10-27 20:36:19,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:36:19,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:19,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:36:19,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:36:19,021 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-10-27 20:36:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:19,120 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-27 20:36:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:36:19,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 20:36:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:19,122 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:36:19,123 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:36:19,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:36:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:36:19,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 20:36:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:36:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 20:36:19,133 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2020-10-27 20:36:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:19,133 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 20:36:19,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:36:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 20:36:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:36:19,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:19,134 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:19,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:36:19,135 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:19,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1428436877, now seen corresponding path program 6 times [2020-10-27 20:36:19,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:19,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377477835] [2020-10-27 20:36:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:19,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:19,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:20,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:21,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:22,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:24,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:24,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:36:24,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:36:24,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:36:24,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:24,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:36:24,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:36:24,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:36:24,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:24,374 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2020-10-27 20:36:24,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:24,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:24,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:24,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:24,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:24,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:36:24,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:24,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:24,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:36:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:24,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:24,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:25,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:25,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:25,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:26,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:26,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:29,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:29,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:36:29,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:36:29,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:36:29,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:29,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:36:29,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:36:29,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:36:29,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:29,783 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-27 20:36:30,081 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 35 [2020-10-27 20:36:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:30,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377477835] [2020-10-27 20:36:30,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:30,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:36:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419204646] [2020-10-27 20:36:30,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:36:30,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:36:30,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:36:30,574 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 14 states. [2020-10-27 20:36:31,351 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-10-27 20:36:31,660 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 20:36:31,969 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 20:36:32,379 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 20:36:32,643 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2020-10-27 20:36:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:32,804 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 20:36:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:36:32,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 20:36:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:32,806 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:36:32,806 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:36:32,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:36:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:36:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 20:36:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:36:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 20:36:32,820 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 36 [2020-10-27 20:36:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:32,820 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 20:36:32,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:36:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 20:36:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:36:32,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:32,821 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:32,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:36:32,822 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:32,822 INFO L82 PathProgramCache]: Analyzing trace with hash -12769197, now seen corresponding path program 7 times [2020-10-27 20:36:32,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:32,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987551432] [2020-10-27 20:36:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:33,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:33,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:34,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:36,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:36,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:37,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:37,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:36:37,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:36:37,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:36:37,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:37,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:36:37,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:36:37,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:36:37,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:38,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:38,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:38,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:38,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:38,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:38,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:38,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:38,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:38,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:38,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:36:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:38,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:39,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:39,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:39,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:39,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:40,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:43,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:43,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:36:43,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:36:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:36:43,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:36:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:36:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:36:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:43,444 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-27 20:36:43,821 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-27 20:36:44,060 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-27 20:36:44,264 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-27 20:36:44,492 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-27 20:36:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:44,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987551432] [2020-10-27 20:36:44,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:44,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:36:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149233905] [2020-10-27 20:36:44,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:36:44,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:36:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:36:44,771 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 16 states. [2020-10-27 20:36:45,966 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-27 20:36:48,594 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 133 DAG size of output: 125 [2020-10-27 20:36:49,071 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2020-10-27 20:36:49,270 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 20:36:49,669 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 20:36:50,549 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 143 [2020-10-27 20:36:51,127 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2020-10-27 20:36:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:51,337 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-27 20:36:51,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:36:51,338 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 20:36:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:51,339 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:36:51,339 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:36:51,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:36:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:36:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 20:36:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:36:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 20:36:51,353 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 39 [2020-10-27 20:36:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:51,353 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 20:36:51,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:36:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 20:36:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:36:51,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:51,354 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:51,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:36:51,355 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:51,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1805138381, now seen corresponding path program 8 times [2020-10-27 20:36:51,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:51,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098016064] [2020-10-27 20:36:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:55,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:56,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:56,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:36:56,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 20:36:56,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 20:36:56,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:56,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:36:56,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:36:56,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:36:56,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:56,578 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 31 [2020-10-27 20:36:56,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:56,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:56,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:56,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:56,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:56,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:56,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:56,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:56,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:56,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:56,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:56,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:36:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:56,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:56,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:56,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:57,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:58,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:58,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:58,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:58,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:58,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:59,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:59,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:59,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:59,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:01,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:01,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:37:01,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:37:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:37:01,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:37:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:37:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:37:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:02,259 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-10-27 20:37:02,604 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-27 20:37:05,913 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-27 20:37:06,373 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-10-27 20:37:06,822 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-27 20:37:09,362 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-27 20:37:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:09,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098016064] [2020-10-27 20:37:09,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:09,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:37:09,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183680244] [2020-10-27 20:37:09,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:37:09,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:37:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:37:09,751 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 17 states. [2020-10-27 20:37:11,266 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 20:37:11,594 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 20:37:12,166 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 101 [2020-10-27 20:37:12,764 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 98 [2020-10-27 20:37:17,390 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 20:37:17,918 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 20:37:24,723 WARN L193 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 182 DAG size of output: 157 [2020-10-27 20:37:27,917 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-10-27 20:37:28,228 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 20:37:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:28,499 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 20:37:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:37:28,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-27 20:37:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:28,502 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:37:28,502 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:37:28,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:37:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:37:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:37:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:37:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 20:37:28,514 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 42 [2020-10-27 20:37:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:28,514 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 20:37:28,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:37:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 20:37:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:37:28,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:28,515 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:28,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:37:28,515 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:28,516 INFO L82 PathProgramCache]: Analyzing trace with hash -447807981, now seen corresponding path program 9 times [2020-10-27 20:37:28,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:28,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087297396] [2020-10-27 20:37:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:28,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:28,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:29,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:29,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:31,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:32,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:33,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:33,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:33,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:33,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:37:33,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:37:33,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-27 20:37:33,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:33,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:37:33,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:37:33,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:37:33,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:33,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:33,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:33,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:33,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:33,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:37:33,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:37:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:33,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:34,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:34,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:34,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:34,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:36,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:37,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:37,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:37,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:37,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:37,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:38,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:38,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:38,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:38,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:37:38,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:37:38,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:37:38,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:38,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:37:38,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:37:38,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:37:38,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:39,534 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2020-10-27 20:37:39,663 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2020-10-27 20:37:39,872 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2020-10-27 20:37:40,037 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-10-27 20:37:40,332 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2020-10-27 20:37:40,575 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2020-10-27 20:37:40,824 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-27 20:37:41,144 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 45 [2020-10-27 20:37:41,464 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 45 [2020-10-27 20:37:41,871 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 45 [2020-10-27 20:37:42,487 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 61 [2020-10-27 20:37:42,880 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 20:37:43,254 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 20:37:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:43,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087297396] [2020-10-27 20:37:43,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:43,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:37:43,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549560396] [2020-10-27 20:37:43,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:37:43,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:43,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:37:43,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:37:43,287 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 19 states. [2020-10-27 20:37:44,395 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-27 20:37:45,082 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 100 [2020-10-27 20:37:45,415 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 20:37:45,844 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 106 [2020-10-27 20:37:46,112 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2020-10-27 20:37:46,611 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2020-10-27 20:37:47,156 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2020-10-27 20:37:47,664 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2020-10-27 20:37:47,890 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 20:37:48,403 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2020-10-27 20:37:48,919 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 106 [2020-10-27 20:37:49,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:49,214 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-27 20:37:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:37:49,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-27 20:37:49,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:49,217 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:37:49,217 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:37:49,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:37:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:37:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 20:37:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:37:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 20:37:49,230 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 45 [2020-10-27 20:37:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:49,231 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 20:37:49,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:37:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 20:37:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:37:49,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:49,232 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:49,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:37:49,232 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:49,233 INFO L82 PathProgramCache]: Analyzing trace with hash -518943731, now seen corresponding path program 10 times [2020-10-27 20:37:49,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:49,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772104425] [2020-10-27 20:37:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:49,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:50,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:50,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:53,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:54,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:37:54,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:37:54,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:37:54,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:54,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:37:54,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:37:54,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:37:54,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:54,443 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 31 [2020-10-27 20:37:54,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:54,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:54,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:37:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:54,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:59,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:37:59,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:37:59,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:37:59,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:37:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:37:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:37:59,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:00,119 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-27 20:38:00,422 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2020-10-27 20:38:00,721 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 43 [2020-10-27 20:38:01,122 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 54 [2020-10-27 20:38:08,120 WARN L193 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-27 20:38:13,240 WARN L193 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 129 DAG size of output: 94 [2020-10-27 20:38:18,037 WARN L193 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2020-10-27 20:38:29,272 WARN L193 SmtUtils]: Spent 11.01 s on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2020-10-27 20:38:47,132 WARN L193 SmtUtils]: Spent 17.40 s on a formula simplification. DAG size of input: 129 DAG size of output: 91 [2020-10-27 20:38:47,422 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-10-27 20:38:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:47,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772104425] [2020-10-27 20:38:47,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:47,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:38:47,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222985416] [2020-10-27 20:38:47,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:38:47,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:38:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:38:47,474 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 19 states. [2020-10-27 20:38:53,337 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79