/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:48:04,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:48:04,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:48:04,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:48:04,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:48:04,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:48:04,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:48:04,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:48:04,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:48:04,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:48:04,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:48:04,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:48:04,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:48:04,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:48:04,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:48:04,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:48:04,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:48:04,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:48:04,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:48:04,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:48:04,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:48:04,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:48:04,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:48:04,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:48:04,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:48:04,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:48:04,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:48:04,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:48:04,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:48:04,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:48:04,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:48:04,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:48:04,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:48:04,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:48:04,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:48:04,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:48:04,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:48:04,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:48:04,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:48:04,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:48:04,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:48:04,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:48:04,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:48:04,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:48:04,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:48:04,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:48:04,470 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:48:04,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:48:04,470 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:48:04,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:48:04,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:48:04,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:48:04,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:48:04,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:48:04,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:48:04,472 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:48:04,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:48:04,473 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:48:04,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:48:04,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:48:04,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:48:04,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:48:04,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:48:04,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:48:04,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:48:04,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:48:04,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:48:04,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:48:04,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:48:04,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:48:04,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:48:04,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:48:04,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:48:04,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:48:04,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:48:04,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:48:04,949 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:48:04,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label38.c [2020-10-27 00:48:05,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac3971905/554ef4f4c3b44241bc3cb1e3c46a4b89/FLAG1d345cde4 [2020-10-27 00:48:06,481 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:48:06,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label38.c [2020-10-27 00:48:06,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac3971905/554ef4f4c3b44241bc3cb1e3c46a4b89/FLAG1d345cde4 [2020-10-27 00:48:07,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac3971905/554ef4f4c3b44241bc3cb1e3c46a4b89 [2020-10-27 00:48:07,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:48:07,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:48:07,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:48:07,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:48:07,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:48:07,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:48:07" (1/1) ... [2020-10-27 00:48:07,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e89483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:07, skipping insertion in model container [2020-10-27 00:48:07,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:48:07" (1/1) ... [2020-10-27 00:48:07,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:48:07,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:48:09,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:48:09,817 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:48:11,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:48:11,233 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:48:11,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11 WrapperNode [2020-10-27 00:48:11,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:48:11,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:48:11,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:48:11,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:48:11,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (1/1) ... [2020-10-27 00:48:11,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (1/1) ... [2020-10-27 00:48:11,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (1/1) ... [2020-10-27 00:48:11,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (1/1) ... [2020-10-27 00:48:11,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (1/1) ... [2020-10-27 00:48:11,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (1/1) ... [2020-10-27 00:48:11,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (1/1) ... [2020-10-27 00:48:11,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:48:11,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:48:11,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:48:11,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:48:11,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:48:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:48:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:48:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:48:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:48:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:48:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:48:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:48:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:48:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:48:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:48:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:48:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:48:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:48:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:48:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:48:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:48:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:48:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:48:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:48:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:48:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:48:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:48:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:48:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:48:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:48:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:48:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:48:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:48:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:48:27,295 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:48:27,296 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:48:27,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:48:27 BoogieIcfgContainer [2020-10-27 00:48:27,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:48:27,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:48:27,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:48:27,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:48:27,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:48:07" (1/3) ... [2020-10-27 00:48:27,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a093ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:48:27, skipping insertion in model container [2020-10-27 00:48:27,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:11" (2/3) ... [2020-10-27 00:48:27,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a093ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:48:27, skipping insertion in model container [2020-10-27 00:48:27,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:48:27" (3/3) ... [2020-10-27 00:48:27,318 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label38.c [2020-10-27 00:48:27,336 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:48:27,344 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:48:27,359 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:48:27,498 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:48:27,498 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:48:27,499 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:48:27,499 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:48:27,499 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:48:27,499 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:48:27,499 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:48:27,499 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:48:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:48:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 00:48:27,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:48:27,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:48:27,568 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:48:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:48:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1941657181, now seen corresponding path program 1 times [2020-10-27 00:48:27,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:48:27,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432168760] [2020-10-27 00:48:27,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:48:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:48:27,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:48:28,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:48:28,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:48:28,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:48:28,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-27 00:48:28,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:48:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:48:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:48:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 00:48:28,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:48:28,827 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:48:28,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:48:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:48:28,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:48:28,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:48:28,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:48:28,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:48:28,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 00:48:28,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:48:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:48:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:48:28,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:48:28,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:48:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:48:28,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432168760] [2020-10-27 00:48:28,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:48:28,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:48:28,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992283382] [2020-10-27 00:48:28,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:48:28,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:48:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:48:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:48:28,974 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 00:48:29,172 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:49:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:49:07,468 INFO L93 Difference]: Finished difference Result 6578 states and 12495 transitions. [2020-10-27 00:49:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:49:07,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 00:49:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:49:07,522 INFO L225 Difference]: With dead ends: 6578 [2020-10-27 00:49:07,522 INFO L226 Difference]: Without dead ends: 4729 [2020-10-27 00:49:07,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:49:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4729 states. [2020-10-27 00:49:07,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4729 to 4626. [2020-10-27 00:49:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4626 states. [2020-10-27 00:49:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 8167 transitions. [2020-10-27 00:49:07,896 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 8167 transitions. Word has length 66 [2020-10-27 00:49:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:49:07,900 INFO L481 AbstractCegarLoop]: Abstraction has 4626 states and 8167 transitions. [2020-10-27 00:49:07,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:49:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 8167 transitions. [2020-10-27 00:49:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 00:49:07,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:49:07,922 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, 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] [2020-10-27 00:49:07,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:49:07,923 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:49:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:49:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 724043220, now seen corresponding path program 1 times [2020-10-27 00:49:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:49:07,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410291207] [2020-10-27 00:49:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:49:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:08,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:09,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:09,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:09,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 00:49:09,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:49:09,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1812 [2020-10-27 00:49:09,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:49:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:49:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 00:49:09,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:49:10,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:49:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:10,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:10,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:10,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:49:10,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:49:10,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:49:10,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:10,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:49:10,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:49:10,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:49:10,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:10,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:49:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:10,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:10,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:10,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:49:10,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:49:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-27 00:49:10,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:49:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:49:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:49:10,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:49:10,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410291207] [2020-10-27 00:49:10,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:49:10,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:49:10,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574788658] [2020-10-27 00:49:10,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:49:10,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:49:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:49:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:49:10,531 INFO L87 Difference]: Start difference. First operand 4626 states and 8167 transitions. Second operand 7 states. [2020-10-27 00:50:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:50:01,193 INFO L93 Difference]: Finished difference Result 13672 states and 24459 transitions. [2020-10-27 00:50:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:50:01,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2020-10-27 00:50:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:50:01,256 INFO L225 Difference]: With dead ends: 13672 [2020-10-27 00:50:01,257 INFO L226 Difference]: Without dead ends: 9052 [2020-10-27 00:50:01,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:50:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9052 states. [2020-10-27 00:50:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9052 to 8968. [2020-10-27 00:50:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8968 states. [2020-10-27 00:50:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8968 states to 8968 states and 13525 transitions. [2020-10-27 00:50:01,654 INFO L78 Accepts]: Start accepts. Automaton has 8968 states and 13525 transitions. Word has length 141 [2020-10-27 00:50:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:50:01,658 INFO L481 AbstractCegarLoop]: Abstraction has 8968 states and 13525 transitions. [2020-10-27 00:50:01,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:50:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 8968 states and 13525 transitions. [2020-10-27 00:50:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 00:50:01,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:50:01,667 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, 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] [2020-10-27 00:50:01,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:50:01,668 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:50:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:50:01,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1379976472, now seen corresponding path program 1 times [2020-10-27 00:50:01,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:50:01,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747004103] [2020-10-27 00:50:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:50:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:02,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:02,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:04,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:04,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 00:50:04,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:50:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2347 [2020-10-27 00:50:04,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:50:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:50:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:50:04,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:04,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:50:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:04,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:04,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:04,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:50:04,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:50:04,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:50:04,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:50:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:50:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:50:04,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:04,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:50:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:04,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:04,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:04,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 00:50:04,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:50:04,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 00:50:04,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:50:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:50:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:50:04,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:50:04,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747004103] [2020-10-27 00:50:04,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:50:04,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:50:04,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639707511] [2020-10-27 00:50:04,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:50:04,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:50:04,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:50:04,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:50:04,541 INFO L87 Difference]: Start difference. First operand 8968 states and 13525 transitions. Second operand 7 states. [2020-10-27 00:50:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:50:53,684 INFO L93 Difference]: Finished difference Result 27196 states and 41875 transitions. [2020-10-27 00:50:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:50:53,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2020-10-27 00:50:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:50:53,773 INFO L225 Difference]: With dead ends: 27196 [2020-10-27 00:50:53,773 INFO L226 Difference]: Without dead ends: 18234 [2020-10-27 00:50:53,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:50:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18234 states. [2020-10-27 00:50:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18234 to 17923. [2020-10-27 00:50:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17923 states. [2020-10-27 00:50:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17923 states to 17923 states and 26430 transitions. [2020-10-27 00:50:54,364 INFO L78 Accepts]: Start accepts. Automaton has 17923 states and 26430 transitions. Word has length 147 [2020-10-27 00:50:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:50:54,371 INFO L481 AbstractCegarLoop]: Abstraction has 17923 states and 26430 transitions. [2020-10-27 00:50:54,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:50:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 17923 states and 26430 transitions. [2020-10-27 00:50:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-27 00:50:54,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:50:54,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:50:54,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:50:54,380 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:50:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:50:54,380 INFO L82 PathProgramCache]: Analyzing trace with hash 787161983, now seen corresponding path program 1 times [2020-10-27 00:50:54,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:50:54,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524078026] [2020-10-27 00:50:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:50:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:54,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:54,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:54,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:55,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:58,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:59,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 00:50:59,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:50:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 00:50:59,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:50:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:50:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:50:59,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:59,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:50:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:59,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:59,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:59,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:50:59,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:50:59,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:50:59,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:59,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:50:59,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:50:59,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:50:59,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:59,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:50:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:59,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:59,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:59,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:50:59,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:50:59,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 00:50:59,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:59,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:50:59,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:50:59,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:50:59,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:00,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-27 00:51:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:00,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:00,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:00,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:51:00,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:00,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 00:51:00,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:00,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:51:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:51:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:51:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 116 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:51:00,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524078026] [2020-10-27 00:51:00,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:51:00,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:51:00,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276798221] [2020-10-27 00:51:00,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:51:00,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:51:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:51:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:51:00,221 INFO L87 Difference]: Start difference. First operand 17923 states and 26430 transitions. Second operand 7 states. [2020-10-27 00:51:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:51:54,769 INFO L93 Difference]: Finished difference Result 45355 states and 67638 transitions. [2020-10-27 00:51:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:51:54,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 242 [2020-10-27 00:51:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:51:54,868 INFO L225 Difference]: With dead ends: 45355 [2020-10-27 00:51:54,868 INFO L226 Difference]: Without dead ends: 27438 [2020-10-27 00:51:54,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:51:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27438 states. [2020-10-27 00:51:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27438 to 25175. [2020-10-27 00:51:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25175 states. [2020-10-27 00:51:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25175 states to 25175 states and 34522 transitions. [2020-10-27 00:51:55,698 INFO L78 Accepts]: Start accepts. Automaton has 25175 states and 34522 transitions. Word has length 242 [2020-10-27 00:51:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:51:55,700 INFO L481 AbstractCegarLoop]: Abstraction has 25175 states and 34522 transitions. [2020-10-27 00:51:55,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:51:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 25175 states and 34522 transitions. [2020-10-27 00:51:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-27 00:51:55,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:51:55,706 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:51:55,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:51:55,707 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:51:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:51:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2123266780, now seen corresponding path program 1 times [2020-10-27 00:51:55,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:51:55,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905211037] [2020-10-27 00:51:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:51:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:55,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:56,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:57,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:57,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 312 [2020-10-27 00:51:57,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:51:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2061 [2020-10-27 00:51:57,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:51:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:51:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-27 00:51:57,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:58,132 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:51:58,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:51:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:58,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:58,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:58,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:51:58,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:51:58,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:51:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:51:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:51:58,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:58,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:51:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:58,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:58,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:58,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 00:51:58,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:58,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-27 00:51:58,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:58,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:51:58,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:51:58,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 235 [2020-10-27 00:51:58,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:51:59,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905211037] [2020-10-27 00:51:59,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:51:59,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:51:59,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836589637] [2020-10-27 00:51:59,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:51:59,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:51:59,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:51:59,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:51:59,100 INFO L87 Difference]: Start difference. First operand 25175 states and 34522 transitions. Second operand 7 states. [2020-10-27 00:51:59,274 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68