/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:09:16,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:09:16,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:09:16,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:09:16,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:09:16,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:09:16,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:09:16,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:09:16,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:09:16,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:09:16,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:09:16,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:09:16,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:09:16,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:09:16,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:09:16,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:09:16,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:09:16,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:09:16,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:09:16,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:09:16,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:09:16,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:09:16,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:09:16,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:09:16,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:09:16,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:09:16,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:09:16,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:09:16,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:09:16,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:09:16,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:09:16,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:09:16,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:09:16,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:09:16,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:09:16,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:09:16,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:09:16,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:09:16,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:09:16,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:09:16,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:09:16,334 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 10:09:16,356 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:09:16,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:09:16,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:09:16,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:09:16,358 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:09:16,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:09:16,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:09:16,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:09:16,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:09:16,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:09:16,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:09:16,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:09:16,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:09:16,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:09:16,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:09:16,361 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:09:16,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:09:16,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:09:16,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:09:16,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:09:16,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:09:16,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:09:16,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:09:16,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:09:16,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:09:16,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:09:16,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:09:16,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:09:16,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:09:16,364 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 10:09:16,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:09:16,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:09:16,735 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:09:16,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:09:16,738 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:09:16,738 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-13 10:09:16,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2e65a1c5/bf41459d32534a5fbf67fe9ad9546e88/FLAG8536991de [2020-10-13 10:09:17,834 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:09:17,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-13 10:09:17,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2e65a1c5/bf41459d32534a5fbf67fe9ad9546e88/FLAG8536991de [2020-10-13 10:09:18,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2e65a1c5/bf41459d32534a5fbf67fe9ad9546e88 [2020-10-13 10:09:18,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:09:18,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:09:18,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:09:18,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:09:18,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:09:18,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:09:18" (1/1) ... [2020-10-13 10:09:18,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38dfc093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:18, skipping insertion in model container [2020-10-13 10:09:18,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:09:18" (1/1) ... [2020-10-13 10:09:18,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:09:18,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:09:20,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:09:20,908 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:09:22,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:09:22,490 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:09:22,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22 WrapperNode [2020-10-13 10:09:22,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:09:22,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:09:22,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:09:22,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:09:22,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (1/1) ... [2020-10-13 10:09:22,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (1/1) ... [2020-10-13 10:09:22,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (1/1) ... [2020-10-13 10:09:22,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (1/1) ... [2020-10-13 10:09:22,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (1/1) ... [2020-10-13 10:09:22,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (1/1) ... [2020-10-13 10:09:23,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (1/1) ... [2020-10-13 10:09:23,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:09:23,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:09:23,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:09:23,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:09:23,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (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 10:09:23,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:09:23,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:09:23,222 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:09:23,222 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:09:23,330 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:09:23,330 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:09:23,331 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:09:23,331 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:09:23,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:09:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:09:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:09:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:09:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:09:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:09:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:09:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:09:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:09:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:09:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:09:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:09:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:09:36,379 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:09:36,380 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:09:36,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:09:36 BoogieIcfgContainer [2020-10-13 10:09:36,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:09:36,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:09:36,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:09:36,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:09:36,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:09:18" (1/3) ... [2020-10-13 10:09:36,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e51854f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:09:36, skipping insertion in model container [2020-10-13 10:09:36,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:22" (2/3) ... [2020-10-13 10:09:36,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e51854f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:09:36, skipping insertion in model container [2020-10-13 10:09:36,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:09:36" (3/3) ... [2020-10-13 10:09:36,417 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2020-10-13 10:09:36,430 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:09:36,445 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:09:36,462 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:09:36,500 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:09:36,501 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:09:36,501 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:09:36,501 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:09:36,501 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:09:36,501 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:09:36,501 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:09:36,502 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:09:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:09:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:09:36,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:09:36,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:09:36,576 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:09:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:09:36,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1129276774, now seen corresponding path program 1 times [2020-10-13 10:09:36,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:09:36,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476217322] [2020-10-13 10:09:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:09:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:36,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:37,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:37,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:09:37,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:37,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-13 10:09:37,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:37,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:09:37,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:09:37,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:09:37,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:09:37,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:09:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:37,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:37,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:37,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:09:37,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:37,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 10:09:37,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:37,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:09:37,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:37,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:09:37,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:09:37,494 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 10:09:37,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476217322] [2020-10-13 10:09:37,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:09:37,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:09:37,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816441704] [2020-10-13 10:09:37,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:09:37,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:09:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:09:37,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:09:37,535 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:10:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:05,279 INFO L93 Difference]: Finished difference Result 5111 states and 9601 transitions. [2020-10-13 10:10:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:05,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-13 10:10:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:05,341 INFO L225 Difference]: With dead ends: 5111 [2020-10-13 10:10:05,342 INFO L226 Difference]: Without dead ends: 3270 [2020-10-13 10:10:05,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:05,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2020-10-13 10:10:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 3199. [2020-10-13 10:10:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-13 10:10:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 5483 transitions. [2020-10-13 10:10:05,658 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 5483 transitions. Word has length 28 [2020-10-13 10:10:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:05,659 INFO L479 AbstractCegarLoop]: Abstraction has 3199 states and 5483 transitions. [2020-10-13 10:10:05,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:10:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 5483 transitions. [2020-10-13 10:10:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 10:10:05,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:05,666 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:10:05,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:10:05,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash 72973317, now seen corresponding path program 1 times [2020-10-13 10:10:05,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:05,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84774525] [2020-10-13 10:10:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:05,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:06,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:07,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:07,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:10:07,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:10:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1582 [2020-10-13 10:10:07,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:07,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:10:07,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:10:07,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:10:07,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:10:07,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:07,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:07,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:07,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:07,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:07,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:10:07,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:07,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:07,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:07,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:07,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:07,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:07,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:07,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:10:07,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:07,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-13 10:10:07,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:07,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:07,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:07,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:10:07,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:07,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84774525] [2020-10-13 10:10:07,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:10:07,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:10:07,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751197561] [2020-10-13 10:10:07,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:10:07,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:10:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:07,705 INFO L87 Difference]: Start difference. First operand 3199 states and 5483 transitions. Second operand 5 states. [2020-10-13 10:10:42,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:42,844 INFO L93 Difference]: Finished difference Result 9246 states and 16039 transitions. [2020-10-13 10:10:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:42,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2020-10-13 10:10:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:42,883 INFO L225 Difference]: With dead ends: 9246 [2020-10-13 10:10:42,883 INFO L226 Difference]: Without dead ends: 6053 [2020-10-13 10:10:42,894 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 10:10:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6053 states. [2020-10-13 10:10:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6053 to 6045. [2020-10-13 10:10:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6045 states. [2020-10-13 10:10:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6045 states to 6045 states and 8817 transitions. [2020-10-13 10:10:43,093 INFO L78 Accepts]: Start accepts. Automaton has 6045 states and 8817 transitions. Word has length 100 [2020-10-13 10:10:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:43,094 INFO L479 AbstractCegarLoop]: Abstraction has 6045 states and 8817 transitions. [2020-10-13 10:10:43,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:10:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 6045 states and 8817 transitions. [2020-10-13 10:10:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 10:10:43,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:43,098 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 10:10:43,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:10:43,099 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:43,100 INFO L82 PathProgramCache]: Analyzing trace with hash 736809605, now seen corresponding path program 1 times [2020-10-13 10:10:43,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:43,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137885213] [2020-10-13 10:10:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:43,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:43,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:43,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 10:10:43,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:10:43,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-13 10:10:43,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:10:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 10:10:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:10:43,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:43,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:43,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:43,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:43,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:43,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:10:43,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:43,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:44,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:44,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:44,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:44,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:10:44,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-13 10:10:44,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:44,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:44,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:44,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:10:44,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:44,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137885213] [2020-10-13 10:10:44,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:10:44,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:10:44,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171014339] [2020-10-13 10:10:44,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:10:44,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:10:44,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:44,256 INFO L87 Difference]: Start difference. First operand 6045 states and 8817 transitions. Second operand 5 states. [2020-10-13 10:11:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:11:33,889 INFO L93 Difference]: Finished difference Result 14919 states and 22787 transitions. [2020-10-13 10:11:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:11:33,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-13 10:11:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:11:33,938 INFO L225 Difference]: With dead ends: 14919 [2020-10-13 10:11:33,938 INFO L226 Difference]: Without dead ends: 8880 [2020-10-13 10:11:33,956 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 10:11:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8880 states. [2020-10-13 10:11:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8880 to 8870. [2020-10-13 10:11:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8870 states. [2020-10-13 10:11:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8870 states to 8870 states and 12191 transitions. [2020-10-13 10:11:34,186 INFO L78 Accepts]: Start accepts. Automaton has 8870 states and 12191 transitions. Word has length 109 [2020-10-13 10:11:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:11:34,188 INFO L479 AbstractCegarLoop]: Abstraction has 8870 states and 12191 transitions. [2020-10-13 10:11:34,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:11:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 8870 states and 12191 transitions. [2020-10-13 10:11:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 10:11:34,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:34,204 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:34,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:11:34,206 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:34,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1595288620, now seen corresponding path program 1 times [2020-10-13 10:11:34,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:34,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312853399] [2020-10-13 10:11:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:34,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:34,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:34,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:35,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:35,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 10:11:35,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:11:35,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-13 10:11:35,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:35,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:11:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-13 10:11:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:11:35,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 10:11:35,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:35,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:35,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:35,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:35,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:11:35,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:35,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:11:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:11:35,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:35,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:35,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:35,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:11:35,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:35,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-13 10:11:35,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 10:11:35,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:36,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312853399] [2020-10-13 10:11:36,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:11:36,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:11:36,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895782089] [2020-10-13 10:11:36,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:11:36,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:36,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:11:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:11:36,018 INFO L87 Difference]: Start difference. First operand 8870 states and 12191 transitions. Second operand 6 states. [2020-10-13 10:12:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:12:23,985 INFO L93 Difference]: Finished difference Result 22022 states and 30884 transitions. [2020-10-13 10:12:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:12:23,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-13 10:12:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:12:24,057 INFO L225 Difference]: With dead ends: 22022 [2020-10-13 10:12:24,057 INFO L226 Difference]: Without dead ends: 13158 [2020-10-13 10:12:24,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:12:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13158 states. [2020-10-13 10:12:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13158 to 11700. [2020-10-13 10:12:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11700 states. [2020-10-13 10:12:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11700 states to 11700 states and 16684 transitions. [2020-10-13 10:12:24,414 INFO L78 Accepts]: Start accepts. Automaton has 11700 states and 16684 transitions. Word has length 115 [2020-10-13 10:12:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:12:24,415 INFO L479 AbstractCegarLoop]: Abstraction has 11700 states and 16684 transitions. [2020-10-13 10:12:24,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:12:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 11700 states and 16684 transitions. [2020-10-13 10:12:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 10:12:24,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:12:24,421 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:24,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:12:24,422 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:12:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:12:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1588271933, now seen corresponding path program 1 times [2020-10-13 10:12:24,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:12:24,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027727049] [2020-10-13 10:12:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:12:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:24,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:24,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:25,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:25,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 10:12:25,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:12:25,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 857 [2020-10-13 10:12:25,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-13 10:12:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:12:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:25,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:12:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:25,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:25,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:25,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:12:25,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:25,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:12:25,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:12:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:12:25,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:25,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:12:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:25,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:25,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:25,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 10:12:25,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:25,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-13 10:12:25,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:25,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:25,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-13 10:12:25,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:12:25,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:12:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:12:25,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027727049] [2020-10-13 10:12:25,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:12:25,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:12:25,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481115668] [2020-10-13 10:12:25,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:12:25,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:12:25,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:12:25,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:12:25,698 INFO L87 Difference]: Start difference. First operand 11700 states and 16684 transitions. Second operand 5 states. [2020-10-13 10:13:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:13:23,563 INFO L93 Difference]: Finished difference Result 34688 states and 50608 transitions. [2020-10-13 10:13:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:13:23,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-13 10:13:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:13:23,661 INFO L225 Difference]: With dead ends: 34688 [2020-10-13 10:13:23,661 INFO L226 Difference]: Without dead ends: 22994 [2020-10-13 10:13:23,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:13:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22994 states. [2020-10-13 10:13:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22994 to 22969. [2020-10-13 10:13:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22969 states. [2020-10-13 10:13:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22969 states to 22969 states and 32579 transitions. [2020-10-13 10:13:24,243 INFO L78 Accepts]: Start accepts. Automaton has 22969 states and 32579 transitions. Word has length 151 [2020-10-13 10:13:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:13:24,244 INFO L479 AbstractCegarLoop]: Abstraction has 22969 states and 32579 transitions. [2020-10-13 10:13:24,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:13:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 22969 states and 32579 transitions. [2020-10-13 10:13:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-13 10:13:24,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:13:24,249 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:24,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:13:24,250 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:13:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:13:24,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1442815371, now seen corresponding path program 1 times [2020-10-13 10:13:24,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:13:24,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791453328] [2020-10-13 10:13:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:13:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:24,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:24,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking...