/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:00:50,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:00:50,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:00:50,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:00:50,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:00:50,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:00:50,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:00:50,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:00:50,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:00:50,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:00:50,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:00:50,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:00:50,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:00:50,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:00:50,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:00:50,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:00:50,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:00:50,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:00:50,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:00:50,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:00:50,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:00:50,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:00:50,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:00:50,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:00:50,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:00:50,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:00:50,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:00:50,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:00:50,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:00:50,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:00:50,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:00:50,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:00:50,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:00:50,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:00:50,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:00:50,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:00:50,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:00:50,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:00:50,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:00:50,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:00:50,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:00:50,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:00:50,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:00:50,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:00:50,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:00:50,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:00:50,506 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:00:50,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:00:50,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:00:50,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:00:50,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:00:50,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:00:50,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:00:50,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:00:50,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:00:50,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:00:50,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:00:50,510 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:00:50,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:00:50,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:00:50,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:00:50,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:00:50,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:00:50,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:00:50,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:00:50,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:00:50,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:00:50,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:00:50,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:00:50,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:00:50,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:00:50,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:00:50,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:00:50,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:00:50,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:00:50,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:00:50,840 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:00:50,841 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label14.c [2020-10-13 10:00:50,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75eea1465/484f72e9227e45f49ebd38308e80a564/FLAG6dfd2fd30 [2020-10-13 10:00:51,830 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:00:51,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label14.c [2020-10-13 10:00:51,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75eea1465/484f72e9227e45f49ebd38308e80a564/FLAG6dfd2fd30 [2020-10-13 10:00:52,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75eea1465/484f72e9227e45f49ebd38308e80a564 [2020-10-13 10:00:52,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:00:52,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:00:52,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:00:52,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:00:52,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:00:52,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:00:52" (1/1) ... [2020-10-13 10:00:52,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332fc18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:52, skipping insertion in model container [2020-10-13 10:00:52,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:00:52" (1/1) ... [2020-10-13 10:00:52,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:00:52,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:00:55,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:00:55,021 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:00:56,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:00:56,105 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:00:56,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56 WrapperNode [2020-10-13 10:00:56,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:00:56,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:00:56,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:00:56,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:00:56,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (1/1) ... [2020-10-13 10:00:56,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (1/1) ... [2020-10-13 10:00:56,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (1/1) ... [2020-10-13 10:00:56,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (1/1) ... [2020-10-13 10:00:56,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (1/1) ... [2020-10-13 10:00:56,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (1/1) ... [2020-10-13 10:00:56,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (1/1) ... [2020-10-13 10:00:56,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:00:56,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:00:56,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:00:56,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:00:56,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:00:56,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:00:56,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:00:56,869 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:00:56,869 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:00:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:00:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:00:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:00:56,871 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:00:56,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:00:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:00:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:00:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:00:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:00:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:00:56,873 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:00:56,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:00:56,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:00:56,874 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:00:56,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:00:56,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:00:56,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:01:10,217 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:01:10,217 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:01:10,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:01:10 BoogieIcfgContainer [2020-10-13 10:01:10,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:01:10,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:01:10,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:01:10,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:01:10,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:00:52" (1/3) ... [2020-10-13 10:01:10,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce691f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:01:10, skipping insertion in model container [2020-10-13 10:01:10,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:00:56" (2/3) ... [2020-10-13 10:01:10,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce691f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:01:10, skipping insertion in model container [2020-10-13 10:01:10,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:01:10" (3/3) ... [2020-10-13 10:01:10,252 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label14.c [2020-10-13 10:01:10,265 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:01:10,277 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:01:10,293 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:01:10,329 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:01:10,329 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:01:10,329 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:01:10,330 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:01:10,330 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:01:10,330 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:01:10,330 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:01:10,330 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:01:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:01:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:01:10,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:01:10,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:01:10,403 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:01:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:01:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash 481874226, now seen corresponding path program 1 times [2020-10-13 10:01:10,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:01:10,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623303023] [2020-10-13 10:01:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:01:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:01:10,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:10,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:01:11,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:01:11,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:01:11,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-13 10:01:11,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:01:11,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:01:11,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:01:11,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:01:11,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:01:11,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:01:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:01:11,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:11,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:01:11,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:01:11,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:01:11,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 10:01:11,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:01:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:01:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:01:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:01:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:01:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:01:11,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623303023] [2020-10-13 10:01:11,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:01:11,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:01:11,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936346266] [2020-10-13 10:01:11,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:01:11,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:01:11,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:01:11,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:01:11,231 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 5 states. [2020-10-13 10:01:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:01:38,759 INFO L93 Difference]: Finished difference Result 5086 states and 9561 transitions. [2020-10-13 10:01:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:01:38,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 10:01:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:01:38,870 INFO L225 Difference]: With dead ends: 5086 [2020-10-13 10:01:38,870 INFO L226 Difference]: Without dead ends: 3245 [2020-10-13 10:01:38,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:01:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2020-10-13 10:01:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3178. [2020-10-13 10:01:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-10-13 10:01:39,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 5849 transitions. [2020-10-13 10:01:39,121 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 5849 transitions. Word has length 18 [2020-10-13 10:01:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:01:39,122 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 5849 transitions. [2020-10-13 10:01:39,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:01:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 5849 transitions. [2020-10-13 10:01:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 10:01:39,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:01:39,128 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-13 10:01:39,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:01:39,129 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:01:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:01:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -162773441, now seen corresponding path program 1 times [2020-10-13 10:01:39,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:01:39,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207158256] [2020-10-13 10:01:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:01:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:01:39,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:39,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:39,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:40,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:01:40,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 10:01:40,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:01:40,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-13 10:01:40,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:01:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:01:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 10:01:40,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:01:40,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 10:01:40,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:01:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:01:40,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:40,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:01:40,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:01:40,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:01:40,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:01:40,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:01:40,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:01:40,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:01:40,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:01:40,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:01:40,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:01:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:01:40,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:40,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:01:40,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:01:40,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:01:40,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 10:01:40,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:01:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:01:40,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 10:01:40,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:01:40,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:01:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:01:40,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207158256] [2020-10-13 10:01:40,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:01:40,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:01:40,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803232628] [2020-10-13 10:01:40,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:01:40,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:01:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:01:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:01:40,914 INFO L87 Difference]: Start difference. First operand 3178 states and 5849 transitions. Second operand 5 states. [2020-10-13 10:02:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:02:12,372 INFO L93 Difference]: Finished difference Result 7873 states and 14546 transitions. [2020-10-13 10:02:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:02:12,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-13 10:02:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:02:12,410 INFO L225 Difference]: With dead ends: 7873 [2020-10-13 10:02:12,411 INFO L226 Difference]: Without dead ends: 4701 [2020-10-13 10:02:12,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:02:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2020-10-13 10:02:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 4636. [2020-10-13 10:02:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4636 states. [2020-10-13 10:02:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 7585 transitions. [2020-10-13 10:02:12,591 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 7585 transitions. Word has length 89 [2020-10-13 10:02:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:02:12,593 INFO L479 AbstractCegarLoop]: Abstraction has 4636 states and 7585 transitions. [2020-10-13 10:02:12,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:02:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 7585 transitions. [2020-10-13 10:02:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:02:12,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:02:12,611 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-13 10:02:12,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:02:12,611 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:02:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:02:12,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1429680139, now seen corresponding path program 1 times [2020-10-13 10:02:12,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:02:12,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153388601] [2020-10-13 10:02:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:02:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:12,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:12,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:13,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:13,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:02:13,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:02:13,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-13 10:02:13,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:02:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:02:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:02:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:02:13,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:02:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:13,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:13,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:13,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:02:13,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:13,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:02:13,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:02:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:02:13,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:02:13,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:02:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:13,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:13,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:13,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:02:13,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-13 10:02:13,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:02:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:02:13,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:02:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:02:13,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153388601] [2020-10-13 10:02:13,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:02:13,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:02:13,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282143550] [2020-10-13 10:02:13,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:02:13,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:02:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:02:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:02:13,966 INFO L87 Difference]: Start difference. First operand 4636 states and 7585 transitions. Second operand 5 states. [2020-10-13 10:02:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:02:52,528 INFO L93 Difference]: Finished difference Result 13516 states and 22389 transitions. [2020-10-13 10:02:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:02:52,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-10-13 10:02:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:02:52,579 INFO L225 Difference]: With dead ends: 13516 [2020-10-13 10:02:52,579 INFO L226 Difference]: Without dead ends: 8886 [2020-10-13 10:02:52,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:02:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8886 states. [2020-10-13 10:02:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8886 to 8880. [2020-10-13 10:02:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8880 states. [2020-10-13 10:02:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 12613 transitions. [2020-10-13 10:02:52,898 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 12613 transitions. Word has length 94 [2020-10-13 10:02:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:02:52,899 INFO L479 AbstractCegarLoop]: Abstraction has 8880 states and 12613 transitions. [2020-10-13 10:02:52,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:02:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 12613 transitions. [2020-10-13 10:02:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 10:02:52,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:02:52,902 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-13 10:02:52,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:02:52,903 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:02:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:02:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1170010413, now seen corresponding path program 1 times [2020-10-13 10:02:52,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:02:52,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422530442] [2020-10-13 10:02:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:02:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:52,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:53,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:53,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:53,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 10:02:53,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:02:53,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-13 10:02:53,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:02:53,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-13 10:02:53,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:02:53,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:02:53,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:02:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:53,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:53,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:02:53,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:53,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:02:53,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:02:53,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:53,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:02:53,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:02:54,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:02:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:54,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:54,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:54,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:02:54,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-13 10:02:54,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:02:54,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:54,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 10:02:54,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:02:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:02:54,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422530442] [2020-10-13 10:02:54,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:02:54,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:02:54,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108881285] [2020-10-13 10:02:54,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:02:54,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:02:54,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:02:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:02:54,302 INFO L87 Difference]: Start difference. First operand 8880 states and 12613 transitions. Second operand 5 states. [2020-10-13 10:03:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:03:51,336 INFO L93 Difference]: Finished difference Result 26282 states and 37931 transitions. [2020-10-13 10:03:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:03:51,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-13 10:03:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:03:51,402 INFO L225 Difference]: With dead ends: 26282 [2020-10-13 10:03:51,402 INFO L226 Difference]: Without dead ends: 17408 [2020-10-13 10:03:51,424 INFO L675 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 [2020-10-13 10:03:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17408 states. [2020-10-13 10:03:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17408 to 17375. [2020-10-13 10:03:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17375 states. [2020-10-13 10:03:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17375 states to 17375 states and 23600 transitions. [2020-10-13 10:03:51,842 INFO L78 Accepts]: Start accepts. Automaton has 17375 states and 23600 transitions. Word has length 120 [2020-10-13 10:03:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:03:51,844 INFO L479 AbstractCegarLoop]: Abstraction has 17375 states and 23600 transitions. [2020-10-13 10:03:51,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:03:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17375 states and 23600 transitions. [2020-10-13 10:03:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 10:03:51,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:51,850 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-13 10:03:51,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:03:51,851 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:51,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:51,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1087361442, now seen corresponding path program 1 times [2020-10-13 10:03:51,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:51,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596732266] [2020-10-13 10:03:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:51,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:51,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:53,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:54,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:54,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 10:03:54,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:03:54,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2657 [2020-10-13 10:03:54,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:03:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 10:03:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:03:54,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:54,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:54,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:54,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:54,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:54,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:54,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:03:54,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:54,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:03:54,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:54,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:03:54,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:54,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:03:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:54,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:54,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:54,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:03:54,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:54,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 10:03:54,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:03:54,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:03:54,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 10:03:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:54,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:54,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:55,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:55,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:03:55,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:03:55,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-13 10:03:55,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:03:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:03:55,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 10:03:55,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:55,533 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-10-13 10:03:55,920 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-13 10:03:56,273 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-13 10:03:56,636 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-13 10:03:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:03:56,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596732266] [2020-10-13 10:03:56,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:03:56,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:03:56,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725072564] [2020-10-13 10:03:56,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:03:56,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:56,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:03:56,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:03:56,891 INFO L87 Difference]: Start difference. First operand 17375 states and 23600 transitions. Second operand 10 states. [2020-10-13 10:03:57,412 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-13 10:03:57,688 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-13 10:03:57,909 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-13 10:03:58,253 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2020-10-13 10:03:58,526 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-10-13 10:03:59,219 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-13 10:03:59,639 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 10:03:59,842 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-13 10:04:00,077 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-13 10:04:01,060 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-13 10:04:01,743 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 10:04:06,311 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-13 10:04:06,619 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-10-13 10:04:08,829 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-13 10:04:14,912 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-13 10:04:15,282 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2020-10-13 10:04:30,801 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-13 10:04:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:04:58,746 INFO L93 Difference]: Finished difference Result 35953 states and 50160 transitions. [2020-10-13 10:04:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:04:58,856 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 172 [2020-10-13 10:04:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:04:58,919 INFO L225 Difference]: With dead ends: 35953 [2020-10-13 10:04:58,919 INFO L226 Difference]: Without dead ends: 18427 [2020-10-13 10:04:58,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:04:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18427 states. [2020-10-13 10:04:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18427 to 17675. [2020-10-13 10:04:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17675 states. [2020-10-13 10:04:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17675 states to 17675 states and 24343 transitions. [2020-10-13 10:04:59,427 INFO L78 Accepts]: Start accepts. Automaton has 17675 states and 24343 transitions. Word has length 172 [2020-10-13 10:04:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:04:59,428 INFO L479 AbstractCegarLoop]: Abstraction has 17675 states and 24343 transitions. [2020-10-13 10:04:59,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:04:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 17675 states and 24343 transitions. [2020-10-13 10:04:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-13 10:04:59,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:04:59,432 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:04:59,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:04:59,432 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:04:59,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:04:59,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1653687304, now seen corresponding path program 1 times [2020-10-13 10:04:59,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:04:59,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159336105] [2020-10-13 10:04:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:04:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:59,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:59,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking...