/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=SHALLOWEST --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/eca-rers2012/Problem17_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:18:48,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:18:48,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:18:48,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:18:48,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:18:48,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:18:48,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:18:48,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:18:48,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:18:48,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:18:48,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:18:48,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:18:48,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:18:48,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:18:48,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:18:48,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:18:48,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:18:48,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:18:48,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:18:48,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:18:48,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:18:48,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:18:48,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:18:48,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:18:48,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:18:48,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:18:48,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:18:48,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:18:48,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:18:48,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:18:48,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:18:48,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:18:48,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:18:48,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:18:48,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:18:48,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:18:48,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:18:48,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:18:48,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:18:48,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:18:48,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:18:48,489 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 00:18:48,540 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:18:48,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:18:48,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:18:48,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:18:48,545 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:18:48,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:18:48,546 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:18:48,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:18:48,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:18:48,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:18:48,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:18:48,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:18:48,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:18:48,549 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:18:48,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:18:48,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:18:48,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:18:48,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:18:48,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:18:48,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:18:48,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:18:48,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:18:48,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:18:48,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:18:48,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:18:48,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:18:48,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:18:48,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:18:48,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:18:48,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:18:48,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:18:49,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:18:49,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:18:49,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:18:49,051 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:18:49,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label52.c [2020-10-27 00:18:49,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c11435fc/4f128395eae34c4f9d6d16092bdb64ad/FLAG1145e7276 [2020-10-27 00:18:50,065 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:18:50,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label52.c [2020-10-27 00:18:50,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c11435fc/4f128395eae34c4f9d6d16092bdb64ad/FLAG1145e7276 [2020-10-27 00:18:50,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c11435fc/4f128395eae34c4f9d6d16092bdb64ad [2020-10-27 00:18:50,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:18:50,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:18:50,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:18:50,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:18:50,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:18:50,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:18:50" (1/1) ... [2020-10-27 00:18:50,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a33f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:50, skipping insertion in model container [2020-10-27 00:18:50,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:18:50" (1/1) ... [2020-10-27 00:18:50,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:18:50,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:18:51,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:18:51,538 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:18:52,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:18:52,327 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:18:52,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52 WrapperNode [2020-10-27 00:18:52,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:18:52,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:18:52,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:18:52,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:18:52,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (1/1) ... [2020-10-27 00:18:52,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (1/1) ... [2020-10-27 00:18:52,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (1/1) ... [2020-10-27 00:18:52,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (1/1) ... [2020-10-27 00:18:52,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (1/1) ... [2020-10-27 00:18:52,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (1/1) ... [2020-10-27 00:18:52,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (1/1) ... [2020-10-27 00:18:52,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:18:52,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:18:52,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:18:52,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:18:52,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (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 00:18:52,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:18:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:18:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:18:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:18:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:18:52,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:18:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:18:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:18:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:18:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:18:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:18:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:18:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:18:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:18:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:18:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:18:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:18:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:18:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:18:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:18:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:19:02,189 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:19:02,190 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:19:02,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:19:02 BoogieIcfgContainer [2020-10-27 00:19:02,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:19:02,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:19:02,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:19:02,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:19:02,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:18:50" (1/3) ... [2020-10-27 00:19:02,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614ade17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:19:02, skipping insertion in model container [2020-10-27 00:19:02,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:52" (2/3) ... [2020-10-27 00:19:02,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614ade17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:19:02, skipping insertion in model container [2020-10-27 00:19:02,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:19:02" (3/3) ... [2020-10-27 00:19:02,214 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label52.c [2020-10-27 00:19:02,229 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:19:02,237 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:19:02,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:19:02,316 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:19:02,316 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:19:02,316 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:19:02,316 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:19:02,317 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:19:02,317 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:19:02,317 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:19:02,317 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:19:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:19:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 00:19:02,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:02,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:02,382 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1136571011, now seen corresponding path program 1 times [2020-10-27 00:19:02,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:02,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655012] [2020-10-27 00:19:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:02,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:03,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:03,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 00:19:03,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:03,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-27 00:19:03,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:03,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 00:19:03,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 00:19:03,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:03,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:03,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:03,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:03,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:03,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 00:19:03,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:03,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:03,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:03,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:03,422 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 00:19:03,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655012] [2020-10-27 00:19:03,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:19:03,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:19:03,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013593167] [2020-10-27 00:19:03,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:19:03,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:19:03,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:19:03,460 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:19:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:18,403 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:19:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:19:18,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 00:19:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:18,449 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:19:18,449 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:19:18,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:19:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:19:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:19:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:19:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:19:18,651 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 13 [2020-10-27 00:19:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:18,652 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:19:18,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:19:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:19:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 00:19:18,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:18,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:18,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:19:18,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:18,662 INFO L82 PathProgramCache]: Analyzing trace with hash -760582750, now seen corresponding path program 1 times [2020-10-27 00:19:18,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:18,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22569120] [2020-10-27 00:19:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:18,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:19,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:19,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:19,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 00:19:19,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:19,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-27 00:19:19,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:19,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:19,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:19,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:19:19,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:20,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:20,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:20,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:20,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:20,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:20,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:19:20,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:20,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:20,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:20,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:20,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:20,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:20,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:20,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:20,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:19:20,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:20,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 00:19:20,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:20,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:20,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:20,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:19:20,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:19:20,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22569120] [2020-10-27 00:19:20,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:19:20,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:19:20,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086448569] [2020-10-27 00:19:20,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:20,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:20,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:20,406 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-27 00:19:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:39,162 INFO L93 Difference]: Finished difference Result 2964 states and 4573 transitions. [2020-10-27 00:19:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:19:39,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-27 00:19:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:39,177 INFO L225 Difference]: With dead ends: 2964 [2020-10-27 00:19:39,177 INFO L226 Difference]: Without dead ends: 1967 [2020-10-27 00:19:39,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:19:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2020-10-27 00:19:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1915. [2020-10-27 00:19:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1915 states. [2020-10-27 00:19:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2483 transitions. [2020-10-27 00:19:39,287 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2483 transitions. Word has length 84 [2020-10-27 00:19:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:39,288 INFO L481 AbstractCegarLoop]: Abstraction has 1915 states and 2483 transitions. [2020-10-27 00:19:39,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:19:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2483 transitions. [2020-10-27 00:19:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 00:19:39,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:39,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:39,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:19:39,298 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:39,299 INFO L82 PathProgramCache]: Analyzing trace with hash -740134761, now seen corresponding path program 1 times [2020-10-27 00:19:39,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:39,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231341771] [2020-10-27 00:19:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:39,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:39,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:39,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 00:19:39,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:39,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 00:19:39,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:19:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 00:19:39,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:39,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:39,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:39,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:39,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:39,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:19:39,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:39,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:39,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:39,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:39,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:39,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:19:39,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:39,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 00:19:39,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:39,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:39,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:39,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:19:39,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:19:40,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231341771] [2020-10-27 00:19:40,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:40,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:19:40,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826030092] [2020-10-27 00:19:40,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:19:40,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:40,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:19:40,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:19:40,050 INFO L87 Difference]: Start difference. First operand 1915 states and 2483 transitions. Second operand 5 states. [2020-10-27 00:19:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:56,202 INFO L93 Difference]: Finished difference Result 4732 states and 6292 transitions. [2020-10-27 00:19:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:19:56,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-27 00:19:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:56,222 INFO L225 Difference]: With dead ends: 4732 [2020-10-27 00:19:56,222 INFO L226 Difference]: Without dead ends: 2377 [2020-10-27 00:19:56,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:19:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2020-10-27 00:19:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2358. [2020-10-27 00:19:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2358 states. [2020-10-27 00:19:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 2901 transitions. [2020-10-27 00:19:56,319 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 2901 transitions. Word has length 87 [2020-10-27 00:19:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:56,320 INFO L481 AbstractCegarLoop]: Abstraction has 2358 states and 2901 transitions. [2020-10-27 00:19:56,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:19:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 2901 transitions. [2020-10-27 00:19:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 00:19:56,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:56,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:56,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:19:56,336 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:56,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1458581017, now seen corresponding path program 1 times [2020-10-27 00:19:56,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:56,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528898169] [2020-10-27 00:19:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:56,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:57,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:57,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-27 00:19:57,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:57,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-27 00:19:57,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:57,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:57,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:19:57,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:19:57,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:19:57,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:57,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:57,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:57,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:57,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:57,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:19:57,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:57,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:57,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:57,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:57,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:57,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:58,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:58,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:58,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:58,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 00:19:58,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:58,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:19:58,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:58,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:58,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:58,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:19:58,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:58,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 00:19:58,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:19:58,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:19:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528898169] [2020-10-27 00:19:58,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:58,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:19:58,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721530687] [2020-10-27 00:19:58,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:58,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:58,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:58,455 INFO L87 Difference]: Start difference. First operand 2358 states and 2901 transitions. Second operand 7 states. [2020-10-27 00:20:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:14,819 INFO L93 Difference]: Finished difference Result 6080 states and 7748 transitions. [2020-10-27 00:20:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:20:14,821 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-10-27 00:20:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:14,843 INFO L225 Difference]: With dead ends: 6080 [2020-10-27 00:20:14,843 INFO L226 Difference]: Without dead ends: 3728 [2020-10-27 00:20:14,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:20:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2020-10-27 00:20:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3720. [2020-10-27 00:20:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-10-27 00:20:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 4554 transitions. [2020-10-27 00:20:14,968 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 4554 transitions. Word has length 173 [2020-10-27 00:20:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:14,969 INFO L481 AbstractCegarLoop]: Abstraction has 3720 states and 4554 transitions. [2020-10-27 00:20:14,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:20:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 4554 transitions. [2020-10-27 00:20:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 00:20:14,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:14,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:14,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:20:14,973 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:14,974 INFO L82 PathProgramCache]: Analyzing trace with hash 492180171, now seen corresponding path program 1 times [2020-10-27 00:20:14,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:14,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890932114] [2020-10-27 00:20:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:15,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:15,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:16,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:18,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:18,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 00:20:18,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:20:18,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3556 [2020-10-27 00:20:18,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:20:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:20:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:20:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:18,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:18,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:18,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:18,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:18,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:18,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:20:18,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:18,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:18,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:18,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:20:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:18,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:18,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:19,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:19,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:19,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:19,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-27 00:20:19,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:20:19,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:19,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:20:19,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:19,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:19,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:19,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:20:19,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:19,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 00:20:19,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:19,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:19,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:19,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:20:19,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:20:19,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890932114] [2020-10-27 00:20:19,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:19,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:20:19,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330552116] [2020-10-27 00:20:19,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:20:19,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:19,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:20:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:20:19,792 INFO L87 Difference]: Start difference. First operand 3720 states and 4554 transitions. Second operand 10 states. [2020-10-27 00:20:26,566 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 00:20:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:51,632 INFO L93 Difference]: Finished difference Result 11710 states and 14783 transitions. [2020-10-27 00:20:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 00:20:51,633 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 175 [2020-10-27 00:20:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:51,675 INFO L225 Difference]: With dead ends: 11710 [2020-10-27 00:20:51,675 INFO L226 Difference]: Without dead ends: 7996 [2020-10-27 00:20:51,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2020-10-27 00:20:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7996 states. [2020-10-27 00:20:51,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7996 to 7905. [2020-10-27 00:20:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7905 states. [2020-10-27 00:20:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7905 states to 7905 states and 9732 transitions. [2020-10-27 00:20:51,934 INFO L78 Accepts]: Start accepts. Automaton has 7905 states and 9732 transitions. Word has length 175 [2020-10-27 00:20:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:51,935 INFO L481 AbstractCegarLoop]: Abstraction has 7905 states and 9732 transitions. [2020-10-27 00:20:51,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:20:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 7905 states and 9732 transitions. [2020-10-27 00:20:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-27 00:20:51,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:51,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:51,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:20:51,938 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1173367787, now seen corresponding path program 1 times [2020-10-27 00:20:51,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:51,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27977287] [2020-10-27 00:20:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:52,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:53,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:53,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-27 00:20:53,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:53,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1228 [2020-10-27 00:20:53,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:53,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:20:53,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:20:53,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 00:20:53,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:53,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:53,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:53,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:53,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:53,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:20:53,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:53,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:53,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:53,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:53,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:53,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:53,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:53,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 00:20:53,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:53,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:53,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:53,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:53,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:53,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:53,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:20:53,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:53,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 00:20:53,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:20:53,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:20:54,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27977287] [2020-10-27 00:20:54,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:54,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:20:54,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705132153] [2020-10-27 00:20:54,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:20:54,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:54,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:20:54,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:20:54,213 INFO L87 Difference]: Start difference. First operand 7905 states and 9732 transitions. Second operand 6 states. [2020-10-27 00:21:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:07,170 INFO L93 Difference]: Finished difference Result 16257 states and 20309 transitions. [2020-10-27 00:21:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:21:07,174 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2020-10-27 00:21:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:07,217 INFO L225 Difference]: With dead ends: 16257 [2020-10-27 00:21:07,217 INFO L226 Difference]: Without dead ends: 8358 [2020-10-27 00:21:07,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2020-10-27 00:21:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 8340. [2020-10-27 00:21:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8340 states. [2020-10-27 00:21:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8340 states to 8340 states and 10359 transitions. [2020-10-27 00:21:07,483 INFO L78 Accepts]: Start accepts. Automaton has 8340 states and 10359 transitions. Word has length 186 [2020-10-27 00:21:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:07,484 INFO L481 AbstractCegarLoop]: Abstraction has 8340 states and 10359 transitions. [2020-10-27 00:21:07,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:21:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 8340 states and 10359 transitions. [2020-10-27 00:21:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-27 00:21:07,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:07,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:07,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:21:07,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:07,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1235503791, now seen corresponding path program 1 times [2020-10-27 00:21:07,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:07,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129435222] [2020-10-27 00:21:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:07,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:08,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:11,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:11,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-27 00:21:11,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:11,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3823 [2020-10-27 00:21:11,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:11,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:21:11,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:11,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 00:21:11,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:11,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:11,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:11,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:11,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:11,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:11,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:21:11,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:11,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:11,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:11,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:11,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:11,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:11,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:11,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-27 00:21:11,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:11,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:21:11,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:11,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:21:11,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:12,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:12,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:12,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:12,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:21:12,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:12,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 00:21:12,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:12,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:12,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:12,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:21:12,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:12,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-27 00:21:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:12,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:12,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:12,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:21:12,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:12,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 00:21:12,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:12,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:12,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:21:12,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:12,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 91 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:21:12,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129435222] [2020-10-27 00:21:12,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:12,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:21:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678140153] [2020-10-27 00:21:12,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:21:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:12,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:21:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:21:12,578 INFO L87 Difference]: Start difference. First operand 8340 states and 10359 transitions. Second operand 10 states. [2020-10-27 00:21:12,834 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-27 00:21:19,300 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-27 00:21:21,025 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:21:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:46,229 INFO L93 Difference]: Finished difference Result 23191 states and 29621 transitions. [2020-10-27 00:21:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 00:21:46,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 253 [2020-10-27 00:21:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:46,290 INFO L225 Difference]: With dead ends: 23191 [2020-10-27 00:21:46,290 INFO L226 Difference]: Without dead ends: 13964 [2020-10-27 00:21:46,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-27 00:21:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13964 states. [2020-10-27 00:21:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13964 to 13857. [2020-10-27 00:21:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13857 states. [2020-10-27 00:21:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13857 states to 13857 states and 16746 transitions. [2020-10-27 00:21:46,773 INFO L78 Accepts]: Start accepts. Automaton has 13857 states and 16746 transitions. Word has length 253 [2020-10-27 00:21:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:46,774 INFO L481 AbstractCegarLoop]: Abstraction has 13857 states and 16746 transitions. [2020-10-27 00:21:46,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:21:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13857 states and 16746 transitions. [2020-10-27 00:21:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-27 00:21:46,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:46,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:46,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:21:46,787 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash -953855024, now seen corresponding path program 1 times [2020-10-27 00:21:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:46,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429398187] [2020-10-27 00:21:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:46,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:47,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:48,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:50,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:51,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:51,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-27 00:21:51,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:21:51,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4362 [2020-10-27 00:21:51,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:51,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:21:51,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:51,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 264 [2020-10-27 00:21:51,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:51,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:51,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:51,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:51,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:51,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:51,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:21:51,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:51,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:51,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:51,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:51,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:51,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:51,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:51,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 00:21:51,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:21:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:21:51,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:51,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:51,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:51,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:21:51,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:51,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 00:21:51,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:21:51,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:52,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:21:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:52,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:52,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:52,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:21:52,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 00:21:52,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:21:52,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 152 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 00:21:52,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429398187] [2020-10-27 00:21:52,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:52,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:21:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895866616] [2020-10-27 00:21:52,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:21:52,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:21:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:21:52,361 INFO L87 Difference]: Start difference. First operand 13857 states and 16746 transitions. Second operand 9 states. [2020-10-27 00:22:24,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:24,974 INFO L93 Difference]: Finished difference Result 39555 states and 51864 transitions. [2020-10-27 00:22:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 00:22:24,977 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 257 [2020-10-27 00:22:24,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:25,138 INFO L225 Difference]: With dead ends: 39555 [2020-10-27 00:22:25,138 INFO L226 Difference]: Without dead ends: 25652 [2020-10-27 00:22:25,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-27 00:22:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25652 states. [2020-10-27 00:22:25,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25652 to 25428. [2020-10-27 00:22:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25428 states. [2020-10-27 00:22:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25428 states to 25428 states and 31255 transitions. [2020-10-27 00:22:25,875 INFO L78 Accepts]: Start accepts. Automaton has 25428 states and 31255 transitions. Word has length 257 [2020-10-27 00:22:25,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:25,876 INFO L481 AbstractCegarLoop]: Abstraction has 25428 states and 31255 transitions. [2020-10-27 00:22:25,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:22:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25428 states and 31255 transitions. [2020-10-27 00:22:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-27 00:22:25,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:25,882 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:25,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:22:25,883 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash -734756913, now seen corresponding path program 1 times [2020-10-27 00:22:25,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:25,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490122547] [2020-10-27 00:22:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:26,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:26,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:26,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:31,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:31,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-27 00:22:31,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:22:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 00:22:31,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:22:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:22:31,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:31,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:31,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:31,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:31,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:31,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:31,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:22:31,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:31,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:31,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:31,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:31,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:31,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:31,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:31,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 00:22:31,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:31,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:31,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:31,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:22:31,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:31,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:31,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:31,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:31,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:22:31,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:31,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 00:22:31,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:31,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:31,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:22:31,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:22:32,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:22:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:32,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:32,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:32,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:22:32,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:32,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 00:22:32,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:22:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:32,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 103 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:22:32,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490122547] [2020-10-27 00:22:32,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:32,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:22:32,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653841441] [2020-10-27 00:22:32,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:22:32,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:32,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:22:32,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:22:32,399 INFO L87 Difference]: Start difference. First operand 25428 states and 31255 transitions. Second operand 7 states. [2020-10-27 00:22:33,306 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:22:37,597 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 71