/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/Problem06_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:32:17,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:32:17,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:32:17,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:32:17,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:32:17,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:32:17,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:32:17,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:32:17,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:32:17,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:32:17,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:32:17,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:32:17,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:32:17,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:32:17,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:32:17,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:32:17,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:32:17,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:32:17,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:32:17,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:32:17,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:32:17,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:32:17,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:32:17,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:32:17,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:32:17,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:32:17,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:32:17,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:32:17,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:32:17,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:32:17,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:32:17,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:32:17,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:32:17,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:32:17,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:32:17,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:32:17,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:32:17,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:32:17,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:32:17,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:32:17,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:32:17,425 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 [2020-10-26 21:32:17,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:32:17,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:32:17,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:32:17,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:32:17,488 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:32:17,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:32:17,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:32:17,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:32:17,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:32:17,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:32:17,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:32:17,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:32:17,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:32:17,491 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:32:17,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:32:17,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:32:17,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:32:17,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:32:17,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:32:17,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:32:17,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:32:17,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:32:17,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:32:17,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:32:17,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:32:17,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:32:17,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:32:17,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:32:17,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:32:17,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:32:17,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:32:17,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:32:17,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:32:17,968 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:32:17,968 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:32:17,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label24.c [2020-10-26 21:32:18,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d016922c9/aa53086f4883485589ce7909abf480a4/FLAG47352158f [2020-10-26 21:32:19,200 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:32:19,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label24.c [2020-10-26 21:32:19,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d016922c9/aa53086f4883485589ce7909abf480a4/FLAG47352158f [2020-10-26 21:32:19,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d016922c9/aa53086f4883485589ce7909abf480a4 [2020-10-26 21:32:19,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:32:19,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:32:19,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:19,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:32:19,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:32:19,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:19" (1/1) ... [2020-10-26 21:32:19,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385fa4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:19, skipping insertion in model container [2020-10-26 21:32:19,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:19" (1/1) ... [2020-10-26 21:32:19,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:32:19,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:32:21,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:22,021 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:32:23,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:23,345 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:32:23,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23 WrapperNode [2020-10-26 21:32:23,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:23,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:32:23,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:32:23,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:32:23,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (1/1) ... [2020-10-26 21:32:23,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (1/1) ... [2020-10-26 21:32:23,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (1/1) ... [2020-10-26 21:32:23,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (1/1) ... [2020-10-26 21:32:23,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (1/1) ... [2020-10-26 21:32:23,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (1/1) ... [2020-10-26 21:32:23,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (1/1) ... [2020-10-26 21:32:23,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:32:23,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:32:23,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:32:23,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:32:23,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (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 [2020-10-26 21:32:24,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:32:24,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:32:24,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:32:24,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:32:24,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:32:24,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:32:24,132 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:32:24,132 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:32:24,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:32:24,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:32:24,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:32:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:32:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:32:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:32:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:32:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:32:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:32:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:32:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:32:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:32:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:32:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:32:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:32:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:32:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:32:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:32:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:32:35,898 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:32:35,898 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:32:35,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:35 BoogieIcfgContainer [2020-10-26 21:32:35,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:32:35,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:32:35,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:32:35,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:32:35,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:32:19" (1/3) ... [2020-10-26 21:32:35,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72634658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:35, skipping insertion in model container [2020-10-26 21:32:35,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:23" (2/3) ... [2020-10-26 21:32:35,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72634658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:35, skipping insertion in model container [2020-10-26 21:32:35,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:35" (3/3) ... [2020-10-26 21:32:35,912 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label24.c [2020-10-26 21:32:35,924 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:32:35,930 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:32:35,944 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:32:35,981 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:32:35,981 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:32:35,981 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:32:35,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:32:35,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:32:35,982 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:32:35,982 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:32:35,982 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:32:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:32:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2020-10-26 21:32:36,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:32:36,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:32:36,111 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:32:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:32:36,126 INFO L82 PathProgramCache]: Analyzing trace with hash -443278744, now seen corresponding path program 1 times [2020-10-26 21:32:36,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:32:36,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127301064] [2020-10-26 21:32:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:32:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:37,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:39,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:42,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:42,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 986 [2020-10-26 21:32:42,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:32:42,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 21:32:42,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:42,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:32:42,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:32:42,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:32:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:32:46,032 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-26 21:32:46,372 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 21:32:46,716 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 21:32:47,080 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 21:32:47,480 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-26 21:32:47,872 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-26 21:32:48,261 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 21:32:48,679 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 21:32:48,942 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-26 21:32:49,217 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-26 21:32:49,475 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-26 21:32:49,701 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 21:32:49,930 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 21:32:50,157 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 21:32:50,816 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:32:50,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:32:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:50,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:50,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:50,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:32:50,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:50,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 21:32:50,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:32:50,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:32:50,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:32:50,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:33:02,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127301064] [2020-10-26 21:33:02,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:33:02,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:33:02,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864001667] [2020-10-26 21:33:02,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:33:02,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:33:02,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:33:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:33:02,714 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:33:03,608 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:33:05,377 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 21:33:07,098 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 21:33:08,925 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-26 21:33:15,227 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 212 DAG size of output: 203 [2020-10-26 21:33:21,528 WARN L193 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 215 DAG size of output: 202 [2020-10-26 21:33:26,126 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 198 DAG size of output: 193 [2020-10-26 21:33:27,936 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 207 DAG size of output: 199 [2020-10-26 21:33:30,136 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 205 DAG size of output: 198 [2020-10-26 21:33:44,575 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 195 DAG size of output: 191 [2020-10-26 21:33:46,348 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 21:33:51,718 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 205 DAG size of output: 195 [2020-10-26 21:34:03,126 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 193 DAG size of output: 189 [2020-10-26 21:34:04,918 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 199 DAG size of output: 193 [2020-10-26 21:34:09,219 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 201 DAG size of output: 191 [2020-10-26 21:34:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:34:28,651 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:34:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:34:28,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 968 [2020-10-26 21:34:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:34:28,708 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:34:28,709 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:34:28,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:34:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:34:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:34:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:34:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:34:28,932 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 968 [2020-10-26 21:34:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:34:28,938 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:34:28,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:34:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:34:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2020-10-26 21:34:28,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:34:28,998 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:34:28,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:34:28,999 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:34:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:34:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash 601052465, now seen corresponding path program 1 times [2020-10-26 21:34:29,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:34:29,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340425792] [2020-10-26 21:34:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:34:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:29,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:31,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:34,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:34,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1058 [2020-10-26 21:34:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:34:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-26 21:34:34,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:34:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:34:34,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:35,132 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:35,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:35,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:35,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:35,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:35,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:35,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 21:34:35,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:35,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:35,363 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:34:35,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:35,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:35,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:35,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:34:35,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:35,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-26 21:34:35,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:35,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:34:35,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:35,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:34:35,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:34:36,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340425792] [2020-10-26 21:34:36,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:34:36,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:34:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856984915] [2020-10-26 21:34:36,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:34:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:34:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:34:36,937 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:34:37,466 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-26 21:34:39,380 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-26 21:35:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:35:09,874 INFO L93 Difference]: Finished difference Result 4455 states and 7480 transitions. [2020-10-26 21:35:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:35:09,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1038 [2020-10-26 21:35:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:35:09,895 INFO L225 Difference]: With dead ends: 4455 [2020-10-26 21:35:09,895 INFO L226 Difference]: Without dead ends: 3195 [2020-10-26 21:35:09,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:35:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3195 states. [2020-10-26 21:35:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3195 to 3118. [2020-10-26 21:35:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3118 states. [2020-10-26 21:35:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 4400 transitions. [2020-10-26 21:35:10,004 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 4400 transitions. Word has length 1038 [2020-10-26 21:35:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:35:10,005 INFO L481 AbstractCegarLoop]: Abstraction has 3118 states and 4400 transitions. [2020-10-26 21:35:10,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:35:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 4400 transitions. [2020-10-26 21:35:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1091 [2020-10-26 21:35:10,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:35:10,022 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:35:10,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:35:10,023 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:35:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:35:10,024 INFO L82 PathProgramCache]: Analyzing trace with hash 965194292, now seen corresponding path program 1 times [2020-10-26 21:35:10,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:35:10,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664505405] [2020-10-26 21:35:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:35:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:10,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:11,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:15,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:15,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1110 [2020-10-26 21:35:15,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:35:15,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 21:35:15,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:35:15,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:35:15,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:35:15,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:18,330 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 21:35:18,464 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 21:35:18,863 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-26 21:35:19,196 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-26 21:35:19,626 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2020-10-26 21:35:19,980 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-26 21:35:20,334 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-26 21:35:20,677 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-26 21:35:20,994 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-26 21:35:21,282 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-26 21:35:21,785 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:35:21,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:35:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:21,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:21,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:21,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:35:21,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:21,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 21:35:21,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:35:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:35:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:35:21,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:22,092 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:35:22,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:35:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:22,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:22,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:22,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:35:22,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:22,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-26 21:35:22,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:22,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:35:22,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:35:22,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:35:22,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:23,179 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-26 21:35:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:35:32,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664505405] [2020-10-26 21:35:32,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:35:32,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:35:32,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207162076] [2020-10-26 21:35:32,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:35:32,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:35:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:35:32,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:35:32,938 INFO L87 Difference]: Start difference. First operand 3118 states and 4400 transitions. Second operand 18 states. [2020-10-26 21:35:33,659 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 21:35:37,262 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2020-10-26 21:35:37,877 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-26 21:35:38,589 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-10-26 21:35:40,553 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 211 DAG size of output: 197 [2020-10-26 21:35:42,559 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 224 DAG size of output: 209 [2020-10-26 21:35:43,514 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-26 21:35:45,566 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 221 DAG size of output: 206 [2020-10-26 21:35:51,435 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 234 DAG size of output: 206 [2020-10-26 21:35:58,759 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-26 21:36:06,553 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 220 DAG size of output: 196 [2020-10-26 21:36:08,657 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 228 DAG size of output: 202 [2020-10-26 21:36:12,484 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 229 DAG size of output: 201