/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 07:14:05,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 07:14:05,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 07:14:05,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 07:14:05,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 07:14:05,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 07:14:05,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 07:14:05,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 07:14:05,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 07:14:05,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 07:14:05,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 07:14:05,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 07:14:05,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 07:14:05,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 07:14:05,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 07:14:05,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 07:14:05,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 07:14:05,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 07:14:05,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 07:14:05,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 07:14:05,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 07:14:05,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 07:14:05,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 07:14:05,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 07:14:05,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 07:14:05,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 07:14:05,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 07:14:05,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 07:14:05,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 07:14:05,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 07:14:05,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 07:14:05,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 07:14:05,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 07:14:05,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 07:14:05,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 07:14:05,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 07:14:05,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 07:14:05,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 07:14:05,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 07:14:05,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 07:14:05,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 07:14:05,428 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 [2020-10-29 07:14:05,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 07:14:05,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 07:14:05,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 07:14:05,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 07:14:05,497 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 07:14:05,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 07:14:05,498 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 07:14:05,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 07:14:05,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 07:14:05,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 07:14:05,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 07:14:05,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 07:14:05,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 07:14:05,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 07:14:05,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 07:14:05,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 07:14:05,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 07:14:05,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 07:14:05,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 07:14:05,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 07:14:05,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 07:14:05,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:14:05,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 07:14:05,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 07:14:05,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 07:14:05,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 07:14:05,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 07:14:05,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 07:14:05,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 07:14:05,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 07:14:05,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 07:14:05,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 07:14:06,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 07:14:06,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 07:14:06,005 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 07:14:06,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2020-10-29 07:14:06,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba914aad2/dd3786ec000d49afa10a1b8ea7d79596/FLAG5e24a291c [2020-10-29 07:14:07,244 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 07:14:07,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2020-10-29 07:14:07,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba914aad2/dd3786ec000d49afa10a1b8ea7d79596/FLAG5e24a291c [2020-10-29 07:14:07,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba914aad2/dd3786ec000d49afa10a1b8ea7d79596 [2020-10-29 07:14:07,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 07:14:07,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 07:14:07,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 07:14:07,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 07:14:07,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 07:14:07,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:14:07" (1/1) ... [2020-10-29 07:14:07,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b223a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:07, skipping insertion in model container [2020-10-29 07:14:07,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:14:07" (1/1) ... [2020-10-29 07:14:07,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 07:14:07,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 07:14:09,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:14:09,574 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 07:14:10,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:14:10,425 INFO L208 MainTranslator]: Completed translation [2020-10-29 07:14:10,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10 WrapperNode [2020-10-29 07:14:10,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 07:14:10,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 07:14:10,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 07:14:10,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 07:14:10,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 07:14:10,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 07:14:10,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 07:14:10,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 07:14:10,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (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 [2020-10-29 07:14:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 07:14:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 07:14:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 07:14:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 07:14:10,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 07:14:10,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 07:14:10,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 07:14:10,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 07:14:10,988 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 07:14:10,988 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 07:14:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 07:14:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 07:14:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 07:14:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 07:14:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 07:14:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 07:14:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 07:14:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 07:14:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 07:14:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 07:14:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 07:14:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 07:14:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 07:14:10,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 07:14:10,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 07:14:21,758 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 07:14:21,760 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 07:14:21,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:14:21 BoogieIcfgContainer [2020-10-29 07:14:21,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 07:14:21,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 07:14:21,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 07:14:21,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 07:14:21,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 07:14:07" (1/3) ... [2020-10-29 07:14:21,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16df0150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:14:21, skipping insertion in model container [2020-10-29 07:14:21,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (2/3) ... [2020-10-29 07:14:21,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16df0150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:14:21, skipping insertion in model container [2020-10-29 07:14:21,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:14:21" (3/3) ... [2020-10-29 07:14:21,780 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2020-10-29 07:14:21,793 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 07:14:21,800 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 07:14:21,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 07:14:21,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 07:14:21,853 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 07:14:21,853 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 07:14:21,853 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 07:14:21,853 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 07:14:21,853 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 07:14:21,853 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 07:14:21,853 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 07:14:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-29 07:14:21,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 07:14:21,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:14:21,913 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] [2020-10-29 07:14:21,913 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:14:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:14:21,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1973932058, now seen corresponding path program 1 times [2020-10-29 07:14:21,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:14:21,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808804635] [2020-10-29 07:14:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:14:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:22,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:22,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 07:14:22,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:14:22,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-29 07:14:22,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:22,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:22,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:14:22,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:14:22,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 07:14:22,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:14:23,215 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:14:23,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:14:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:23,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:23,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:23,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:14:23,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:14:23,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-29 07:14:23,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:23,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:23,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:14:23,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:14:23,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:14:23,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:14:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:14:23,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808804635] [2020-10-29 07:14:23,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:14:23,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 07:14:23,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568626855] [2020-10-29 07:14:23,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 07:14:23,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:14:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 07:14:23,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 07:14:23,424 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-29 07:14:23,592 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:14:42,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:14:42,666 INFO L93 Difference]: Finished difference Result 3112 states and 5735 transitions. [2020-10-29 07:14:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:14:42,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-29 07:14:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:14:42,711 INFO L225 Difference]: With dead ends: 3112 [2020-10-29 07:14:42,711 INFO L226 Difference]: Without dead ends: 1904 [2020-10-29 07:14:42,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:14:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-10-29 07:14:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1884. [2020-10-29 07:14:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-10-29 07:14:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2891 transitions. [2020-10-29 07:14:42,920 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2891 transitions. Word has length 62 [2020-10-29 07:14:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:14:42,921 INFO L481 AbstractCegarLoop]: Abstraction has 1884 states and 2891 transitions. [2020-10-29 07:14:42,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 07:14:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2891 transitions. [2020-10-29 07:14:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-29 07:14:42,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:14:42,929 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:14:42,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 07:14:42,930 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:14:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:14:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1031465406, now seen corresponding path program 1 times [2020-10-29 07:14:42,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:14:42,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758114891] [2020-10-29 07:14:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:14:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:43,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:44,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:45,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:45,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-29 07:14:45,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:14:45,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2194 [2020-10-29 07:14:45,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:45,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:14:45,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-29 07:14:45,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 07:14:45,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 07:14:45,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:14:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:45,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:45,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:45,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:14:45,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:14:45,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 07:14:45,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:45,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:45,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:14:45,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:14:45,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:14:45,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 07:14:45,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:14:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:45,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:45,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 07:14:45,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:14:45,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-29 07:14:45,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:45,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:45,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:14:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:14:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 07:14:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:14:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:14:45,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758114891] [2020-10-29 07:14:45,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:14:45,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:14:45,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984451055] [2020-10-29 07:14:45,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:14:45,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:14:45,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:14:45,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:14:45,679 INFO L87 Difference]: Start difference. First operand 1884 states and 2891 transitions. Second operand 5 states. [2020-10-29 07:15:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:15:06,363 INFO L93 Difference]: Finished difference Result 5463 states and 8425 transitions. [2020-10-29 07:15:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:15:06,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-10-29 07:15:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:15:06,392 INFO L225 Difference]: With dead ends: 5463 [2020-10-29 07:15:06,393 INFO L226 Difference]: Without dead ends: 3585 [2020-10-29 07:15:06,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:15:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2020-10-29 07:15:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3564. [2020-10-29 07:15:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3564 states. [2020-10-29 07:15:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 4831 transitions. [2020-10-29 07:15:06,525 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 4831 transitions. Word has length 131 [2020-10-29 07:15:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:15:06,526 INFO L481 AbstractCegarLoop]: Abstraction has 3564 states and 4831 transitions. [2020-10-29 07:15:06,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:15:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 4831 transitions. [2020-10-29 07:15:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-29 07:15:06,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:15:06,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:15:06,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 07:15:06,532 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:15:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:15:06,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1486741813, now seen corresponding path program 1 times [2020-10-29 07:15:06,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:15:06,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618268499] [2020-10-29 07:15:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:15:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:06,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:08,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:08,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-29 07:15:08,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:15:08,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1443 [2020-10-29 07:15:08,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:08,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:15:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-29 07:15:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 07:15:08,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:08,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:15:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:08,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:08,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:08,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:15:08,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:08,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 07:15:08,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:08,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:15:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:15:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:15:08,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:08,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:15:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:08,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:08,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:08,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 07:15:08,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:08,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-29 07:15:08,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:08,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:08,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:15:08,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:15:08,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 07:15:08,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:15:08,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618268499] [2020-10-29 07:15:08,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:15:08,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:15:08,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027373034] [2020-10-29 07:15:08,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:15:08,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:15:08,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:15:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:15:08,484 INFO L87 Difference]: Start difference. First operand 3564 states and 4831 transitions. Second operand 5 states. [2020-10-29 07:15:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:15:30,588 INFO L93 Difference]: Finished difference Result 8776 states and 12277 transitions. [2020-10-29 07:15:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:15:30,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2020-10-29 07:15:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:15:30,628 INFO L225 Difference]: With dead ends: 8776 [2020-10-29 07:15:30,628 INFO L226 Difference]: Without dead ends: 5218 [2020-10-29 07:15:30,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:15:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2020-10-29 07:15:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5210. [2020-10-29 07:15:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5210 states. [2020-10-29 07:15:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 6732 transitions. [2020-10-29 07:15:30,885 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 6732 transitions. Word has length 138 [2020-10-29 07:15:30,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:15:30,886 INFO L481 AbstractCegarLoop]: Abstraction has 5210 states and 6732 transitions. [2020-10-29 07:15:30,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:15:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 6732 transitions. [2020-10-29 07:15:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-29 07:15:30,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:15:30,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:15:30,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 07:15:30,891 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:15:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:15:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -919002502, now seen corresponding path program 1 times [2020-10-29 07:15:30,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:15:30,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052937410] [2020-10-29 07:15:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:15:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:30,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:32,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:32,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-29 07:15:32,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:15:32,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1112 [2020-10-29 07:15:32,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:32,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:32,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:15:32,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:15:32,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-29 07:15:32,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:32,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:15:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:32,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:32,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:15:32,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:32,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 07:15:32,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:32,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:15:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:15:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:15:32,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:32,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:15:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:32,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:32,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:32,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 07:15:32,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:32,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-29 07:15:32,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:32,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:15:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:15:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 07:15:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:15:32,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052937410] [2020-10-29 07:15:32,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:15:32,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 07:15:32,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33636445] [2020-10-29 07:15:32,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 07:15:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:15:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 07:15:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:15:32,673 INFO L87 Difference]: Start difference. First operand 5210 states and 6732 transitions. Second operand 8 states. [2020-10-29 07:16:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:16:13,061 INFO L93 Difference]: Finished difference Result 13867 states and 19033 transitions. [2020-10-29 07:16:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 07:16:13,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 148 [2020-10-29 07:16:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:16:13,118 INFO L225 Difference]: With dead ends: 13867 [2020-10-29 07:16:13,119 INFO L226 Difference]: Without dead ends: 8663 [2020-10-29 07:16:13,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 07:16:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2020-10-29 07:16:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 8606. [2020-10-29 07:16:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8606 states. [2020-10-29 07:16:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8606 states to 8606 states and 11296 transitions. [2020-10-29 07:16:13,438 INFO L78 Accepts]: Start accepts. Automaton has 8606 states and 11296 transitions. Word has length 148 [2020-10-29 07:16:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:16:13,438 INFO L481 AbstractCegarLoop]: Abstraction has 8606 states and 11296 transitions. [2020-10-29 07:16:13,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 07:16:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8606 states and 11296 transitions. [2020-10-29 07:16:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-29 07:16:13,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:13,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:16:13,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 07:16:13,445 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:13,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:13,446 INFO L82 PathProgramCache]: Analyzing trace with hash 786588942, now seen corresponding path program 1 times [2020-10-29 07:16:13,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:13,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460019226] [2020-10-29 07:16:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:13,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:13,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:15,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:15,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-29 07:16:15,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:16:15,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1475 [2020-10-29 07:16:15,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:15,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:15,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:16:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:16:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-29 07:16:15,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:16:15,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:15,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:15,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:15,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:15,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:15,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 07:16:15,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:15,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:15,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:15,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:15,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:16:15,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:16:15,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:16:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:15,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:15,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:15,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 07:16:15,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:15,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-29 07:16:15,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:15,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:15,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:16:15,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:16:15,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 07:16:15,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 07:16:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:16:15,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460019226] [2020-10-29 07:16:15,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:16:15,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:16:15,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266389606] [2020-10-29 07:16:15,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:16:15,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:15,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:16:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:16:15,655 INFO L87 Difference]: Start difference. First operand 8606 states and 11296 transitions. Second operand 7 states. [2020-10-29 07:16:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:16:44,047 INFO L93 Difference]: Finished difference Result 26105 states and 35491 transitions. [2020-10-29 07:16:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 07:16:44,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2020-10-29 07:16:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:16:44,147 INFO L225 Difference]: With dead ends: 26105 [2020-10-29 07:16:44,147 INFO L226 Difference]: Without dead ends: 17505 [2020-10-29 07:16:44,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:16:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17505 states. [2020-10-29 07:16:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17505 to 17358. [2020-10-29 07:16:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17358 states. [2020-10-29 07:16:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17358 states to 17358 states and 22334 transitions. [2020-10-29 07:16:44,679 INFO L78 Accepts]: Start accepts. Automaton has 17358 states and 22334 transitions. Word has length 171 [2020-10-29 07:16:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:16:44,680 INFO L481 AbstractCegarLoop]: Abstraction has 17358 states and 22334 transitions. [2020-10-29 07:16:44,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:16:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 17358 states and 22334 transitions. [2020-10-29 07:16:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-29 07:16:44,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:44,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:16:44,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 07:16:44,685 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:44,686 INFO L82 PathProgramCache]: Analyzing trace with hash -650478881, now seen corresponding path program 1 times [2020-10-29 07:16:44,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:44,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046170029] [2020-10-29 07:16:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:44,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:45,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:45,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:45,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-29 07:16:45,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:16:45,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-29 07:16:45,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:45,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:45,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:16:45,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-29 07:16:45,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 07:16:45,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:45,880 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:16:45,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:45,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:45,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:45,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:45,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:45,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 07:16:45,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:45,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:45,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:16:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:16:45,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:45,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:16:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:46,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:46,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:46,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 07:16:46,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:46,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-29 07:16:46,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:46,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:46,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:46,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:46,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 07:16:46,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:16:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:16:46,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046170029] [2020-10-29 07:16:46,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:16:46,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:16:46,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794587295] [2020-10-29 07:16:46,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:16:46,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:16:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:16:46,477 INFO L87 Difference]: Start difference. First operand 17358 states and 22334 transitions. Second operand 5 states. [2020-10-29 07:16:47,764 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-29 07:17:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:17:08,085 INFO L93 Difference]: Finished difference Result 26594 states and 35309 transitions. [2020-10-29 07:17:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:17:08,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-10-29 07:17:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:17:08,162 INFO L225 Difference]: With dead ends: 26594 [2020-10-29 07:17:08,162 INFO L226 Difference]: Without dead ends: 17393 [2020-10-29 07:17:08,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:17:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2020-10-29 07:17:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 17358. [2020-10-29 07:17:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17358 states. [2020-10-29 07:17:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17358 states to 17358 states and 22322 transitions. [2020-10-29 07:17:08,668 INFO L78 Accepts]: Start accepts. Automaton has 17358 states and 22322 transitions. Word has length 191 [2020-10-29 07:17:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:17:08,669 INFO L481 AbstractCegarLoop]: Abstraction has 17358 states and 22322 transitions. [2020-10-29 07:17:08,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:17:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 17358 states and 22322 transitions. [2020-10-29 07:17:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-29 07:17:08,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:17:08,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:17:08,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 07:17:08,676 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:17:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:17:08,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1734385825, now seen corresponding path program 1 times [2020-10-29 07:17:08,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:17:08,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643216798] [2020-10-29 07:17:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:17:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:08,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:09,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:09,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:12,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:12,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-29 07:17:12,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:17:12,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4081 [2020-10-29 07:17:12,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:12,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:12,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:17:12,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:17:12,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-29 07:17:12,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:13,133 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:17:13,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:17:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:13,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:13,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:13,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:17:13,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:13,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 07:17:13,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:13,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:13,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:17:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:17:13,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:13,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:17:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:13,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:13,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:13,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-29 07:17:13,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:13,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-29 07:17:13,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:13,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:13,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:17:13,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 196 [2020-10-29 07:17:13,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:17:13,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643216798] [2020-10-29 07:17:13,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:17:13,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:17:13,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674368864] [2020-10-29 07:17:13,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:17:13,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:17:13,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:17:13,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:17:13,930 INFO L87 Difference]: Start difference. First operand 17358 states and 22322 transitions. Second operand 7 states. [2020-10-29 07:17:14,112 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:17:17,497 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:17:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:17:46,553 INFO L93 Difference]: Finished difference Result 48187 states and 66143 transitions. [2020-10-29 07:17:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:17:46,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 257 [2020-10-29 07:17:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:17:46,749 INFO L225 Difference]: With dead ends: 48187 [2020-10-29 07:17:46,750 INFO L226 Difference]: Without dead ends: 31638 [2020-10-29 07:17:46,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:17:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31638 states. [2020-10-29 07:17:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31638 to 31469. [2020-10-29 07:17:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31469 states. [2020-10-29 07:17:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31469 states to 31469 states and 40010 transitions. [2020-10-29 07:17:48,185 INFO L78 Accepts]: Start accepts. Automaton has 31469 states and 40010 transitions. Word has length 257 [2020-10-29 07:17:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:17:48,185 INFO L481 AbstractCegarLoop]: Abstraction has 31469 states and 40010 transitions. [2020-10-29 07:17:48,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:17:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31469 states and 40010 transitions. [2020-10-29 07:17:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-29 07:17:48,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:17:48,192 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-29 07:17:48,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 07:17:48,193 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:17:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:17:48,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1630208185, now seen corresponding path program 1 times [2020-10-29 07:17:48,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:17:48,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701892070] [2020-10-29 07:17:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:17:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:48,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:48,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:50,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:50,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-29 07:17:50,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:17:50,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2236 [2020-10-29 07:17:50,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:50,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-29 07:17:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 07:17:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:50,919 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:17:50,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:17:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:50,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:50,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:17:50,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:50,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 07:17:50,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:50,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:50,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:17:50,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:50,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:17:50,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:50,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:17:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:51,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:51,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 07:17:51,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:51,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 07:17:51,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:51,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:51,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:17:51,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:51,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 07:17:51,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:51,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-29 07:17:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:51,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:51,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:51,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 07:17:51,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:51,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-29 07:17:51,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:51,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:51,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:17:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 07:17:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:17:51,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701892070] [2020-10-29 07:17:51,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:17:51,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:17:51,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706667428] [2020-10-29 07:17:51,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:17:51,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:17:51,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:17:51,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:17:51,609 INFO L87 Difference]: Start difference. First operand 31469 states and 40010 transitions. Second operand 7 states. [2020-10-29 07:17:52,939 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:17:56,710 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 66