/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=DEEPEST --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/Problem04_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 15:52:45,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 15:52:45,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 15:52:45,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 15:52:45,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 15:52:45,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 15:52:45,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 15:52:45,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 15:52:45,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 15:52:45,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 15:52:45,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 15:52:45,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 15:52:45,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 15:52:45,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 15:52:45,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 15:52:45,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 15:52:45,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 15:52:45,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 15:52:45,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 15:52:45,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 15:52:45,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 15:52:45,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 15:52:45,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 15:52:45,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 15:52:45,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 15:52:45,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 15:52:45,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 15:52:45,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 15:52:45,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 15:52:45,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 15:52:45,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 15:52:45,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 15:52:45,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 15:52:45,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 15:52:45,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 15:52:45,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 15:52:45,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 15:52:45,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 15:52:45,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 15:52:45,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 15:52:45,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 15:52:45,306 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 15:52:45,358 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 15:52:45,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 15:52:45,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 15:52:45,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 15:52:45,363 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 15:52:45,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 15:52:45,364 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 15:52:45,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 15:52:45,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 15:52:45,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 15:52:45,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 15:52:45,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 15:52:45,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 15:52:45,366 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 15:52:45,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 15:52:45,367 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 15:52:45,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 15:52:45,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 15:52:45,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 15:52:45,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 15:52:45,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 15:52:45,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:52:45,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 15:52:45,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 15:52:45,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 15:52:45,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 15:52:45,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 15:52:45,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 15:52:45,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 15:52:45,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 15:52:45,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 15:52:45,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 15:52:45,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 15:52:45,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 15:52:45,862 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 15:52:45,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label10.c [2020-10-27 15:52:45,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77590bce2/9b122acdbe3640b991c89d1160749f48/FLAGd35dc5d5e [2020-10-27 15:52:47,055 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 15:52:47,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label10.c [2020-10-27 15:52:47,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77590bce2/9b122acdbe3640b991c89d1160749f48/FLAGd35dc5d5e [2020-10-27 15:52:47,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77590bce2/9b122acdbe3640b991c89d1160749f48 [2020-10-27 15:52:47,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 15:52:47,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 15:52:47,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 15:52:47,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 15:52:47,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 15:52:47,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:52:47" (1/1) ... [2020-10-27 15:52:47,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@767169d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:47, skipping insertion in model container [2020-10-27 15:52:47,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:52:47" (1/1) ... [2020-10-27 15:52:47,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 15:52:47,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 15:52:49,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:52:49,263 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 15:52:50,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:52:50,107 INFO L208 MainTranslator]: Completed translation [2020-10-27 15:52:50,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50 WrapperNode [2020-10-27 15:52:50,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 15:52:50,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 15:52:50,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 15:52:50,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 15:52:50,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (1/1) ... [2020-10-27 15:52:50,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (1/1) ... [2020-10-27 15:52:50,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (1/1) ... [2020-10-27 15:52:50,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (1/1) ... [2020-10-27 15:52:50,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (1/1) ... [2020-10-27 15:52:50,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (1/1) ... [2020-10-27 15:52:50,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (1/1) ... [2020-10-27 15:52:50,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 15:52:50,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 15:52:50,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 15:52:50,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 15:52:50,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:52:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 15:52:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 15:52:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 15:52:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 15:52:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 15:52:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 15:52:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 15:52:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 15:52:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 15:52:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 15:52:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 15:52:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 15:52:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 15:52:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 15:52:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 15:52:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 15:52:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 15:52:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 15:52:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 15:52:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 15:52:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 15:52:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 15:52:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 15:52:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 15:52:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 15:52:56,388 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 15:52:56,389 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 15:52:56,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:52:56 BoogieIcfgContainer [2020-10-27 15:52:56,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 15:52:56,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 15:52:56,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 15:52:56,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 15:52:56,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:52:47" (1/3) ... [2020-10-27 15:52:56,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585354c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:52:56, skipping insertion in model container [2020-10-27 15:52:56,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:50" (2/3) ... [2020-10-27 15:52:56,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585354c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:52:56, skipping insertion in model container [2020-10-27 15:52:56,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:52:56" (3/3) ... [2020-10-27 15:52:56,404 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label10.c [2020-10-27 15:52:56,417 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 15:52:56,422 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 15:52:56,436 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 15:52:56,474 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 15:52:56,475 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 15:52:56,475 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 15:52:56,475 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 15:52:56,475 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 15:52:56,475 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 15:52:56,475 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 15:52:56,475 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 15:52:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-27 15:52:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2020-10-27 15:52:56,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:52:56,568 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] [2020-10-27 15:52:56,568 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:52:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:52:56,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1067452632, now seen corresponding path program 1 times [2020-10-27 15:52:56,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:52:56,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281855386] [2020-10-27 15:52:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:52:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:52:57,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:59,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:02,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:02,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 839 [2020-10-27 15:53:02,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:53:02,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-27 15:53:02,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:02,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 15:53:02,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 15:53:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-27 15:53:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 15:53:04,973 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-27 15:53:05,227 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-27 15:53:05,408 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-27 15:53:05,549 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-27 15:53:05,687 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-27 15:53:05,826 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-27 15:53:05,965 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-27 15:53:06,572 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:53:06,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:53:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:06,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:06,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:06,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:53:06,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:53:06,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 15:53:06,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:53:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:53:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 15:53:06,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:53:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:53:12,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281855386] [2020-10-27 15:53:12,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 15:53:12,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-27 15:53:12,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407005832] [2020-10-27 15:53:12,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 15:53:12,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:53:12,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 15:53:12,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 15:53:12,029 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 18 states. [2020-10-27 15:53:12,248 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 15:53:12,469 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 15:53:12,680 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 15:53:12,950 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 15:53:13,416 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 15:53:13,785 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 15:53:16,500 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 15:53:17,032 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 137 [2020-10-27 15:53:19,514 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 15:53:19,868 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 118 [2020-10-27 15:53:21,348 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 115 [2020-10-27 15:53:25,767 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 15:53:25,953 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 15:53:31,533 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 15:53:31,696 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 15:53:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:53:34,800 INFO L93 Difference]: Finished difference Result 2553 states and 4911 transitions. [2020-10-27 15:53:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:53:34,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 823 [2020-10-27 15:53:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:53:34,862 INFO L225 Difference]: With dead ends: 2553 [2020-10-27 15:53:34,863 INFO L226 Difference]: Without dead ends: 1581 [2020-10-27 15:53:34,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 15:53:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-27 15:53:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2020-10-27 15:53:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-27 15:53:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2340 transitions. [2020-10-27 15:53:35,057 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2340 transitions. Word has length 823 [2020-10-27 15:53:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:53:35,061 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 2340 transitions. [2020-10-27 15:53:35,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 15:53:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2340 transitions. [2020-10-27 15:53:35,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2020-10-27 15:53:35,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:53:35,102 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 15:53:35,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 15:53:35,103 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:53:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:53:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1109674153, now seen corresponding path program 1 times [2020-10-27 15:53:35,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:53:35,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231343101] [2020-10-27 15:53:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:53:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:35,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:36,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:39,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:40,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:40,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 860 [2020-10-27 15:53:40,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:53:40,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 15:53:40,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:40,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:53:40,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 15:53:40,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 827 [2020-10-27 15:53:40,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:40,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:53:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:40,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:40,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:40,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:53:40,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:53:40,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:53:40,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:53:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:53:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:53:40,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:40,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:53:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:40,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:40,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:40,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:53:40,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:53:40,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 15:53:40,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:53:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:53:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 15:53:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:53:41,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231343101] [2020-10-27 15:53:41,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:53:41,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:53:41,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662526351] [2020-10-27 15:53:41,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:53:41,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:53:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:53:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:53:41,629 INFO L87 Difference]: Start difference. First operand 1581 states and 2340 transitions. Second operand 5 states. [2020-10-27 15:53:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:53:50,869 INFO L93 Difference]: Finished difference Result 3274 states and 5554 transitions. [2020-10-27 15:53:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:53:50,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 842 [2020-10-27 15:53:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:53:50,887 INFO L225 Difference]: With dead ends: 3274 [2020-10-27 15:53:50,887 INFO L226 Difference]: Without dead ends: 2426 [2020-10-27 15:53:50,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:53:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2020-10-27 15:53:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2426. [2020-10-27 15:53:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2426 states. [2020-10-27 15:53:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3479 transitions. [2020-10-27 15:53:50,959 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3479 transitions. Word has length 842 [2020-10-27 15:53:50,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:53:50,960 INFO L481 AbstractCegarLoop]: Abstraction has 2426 states and 3479 transitions. [2020-10-27 15:53:50,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:53:50,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3479 transitions. [2020-10-27 15:53:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2020-10-27 15:53:50,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:53:50,989 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-27 15:53:50,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 15:53:50,990 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:53:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:53:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -581048779, now seen corresponding path program 1 times [2020-10-27 15:53:50,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:53:50,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259017798] [2020-10-27 15:53:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:53:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:51,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:51,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:53,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:56,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:56,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 870 [2020-10-27 15:53:56,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:53:56,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 15:53:56,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:53:56,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 15:53:56,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 786 [2020-10-27 15:53:56,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:56,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:53:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:56,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:56,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:53:56,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:53:56,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:53:56,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:56,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:53:56,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:53:56,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:53:56,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:56,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:53:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:56,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:56,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:56,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:53:56,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:53:56,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:53:56,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:56,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:53:56,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:53:56,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:53:56,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:56,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:53:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:56,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:56,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:56,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:53:56,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:53:56,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:53:56,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:53:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:53:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 15:53:56,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 15:54:00,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259017798] [2020-10-27 15:54:00,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:54:00,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:54:00,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431749268] [2020-10-27 15:54:00,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:54:00,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:54:00,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:54:00,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:54:00,627 INFO L87 Difference]: Start difference. First operand 2426 states and 3479 transitions. Second operand 5 states. [2020-10-27 15:54:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:54:11,658 INFO L93 Difference]: Finished difference Result 4905 states and 7770 transitions. [2020-10-27 15:54:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:54:11,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 850 [2020-10-27 15:54:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:54:11,672 INFO L225 Difference]: With dead ends: 4905 [2020-10-27 15:54:11,672 INFO L226 Difference]: Without dead ends: 2426 [2020-10-27 15:54:11,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:54:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2020-10-27 15:54:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2426. [2020-10-27 15:54:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2426 states. [2020-10-27 15:54:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2793 transitions. [2020-10-27 15:54:11,761 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2793 transitions. Word has length 850 [2020-10-27 15:54:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:54:11,762 INFO L481 AbstractCegarLoop]: Abstraction has 2426 states and 2793 transitions. [2020-10-27 15:54:11,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:54:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2793 transitions. [2020-10-27 15:54:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2020-10-27 15:54:11,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:54:11,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 15:54:11,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 15:54:11,774 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:54:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:54:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash -806924928, now seen corresponding path program 1 times [2020-10-27 15:54:11,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:54:11,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195248155] [2020-10-27 15:54:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:54:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:11,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:16,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:16,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 877 [2020-10-27 15:54:16,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:54:16,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-27 15:54:16,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:54:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 15:54:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 827 [2020-10-27 15:54:16,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:17,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:54:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:17,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:17,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:17,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:54:17,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:54:17,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:17,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:54:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:17,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:17,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:17,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:54:17,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:17,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 15:54:17,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:17,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:17,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:17,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:17,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:17,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:54:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:17,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:17,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:17,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 15:54:17,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:17,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 15:54:17,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:17,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:54:17,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:17,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 15:54:17,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 15:54:18,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195248155] [2020-10-27 15:54:18,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:54:18,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 15:54:18,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958108014] [2020-10-27 15:54:18,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 15:54:18,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:54:18,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 15:54:18,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:54:18,207 INFO L87 Difference]: Start difference. First operand 2426 states and 2793 transitions. Second operand 6 states. [2020-10-27 15:54:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:54:28,333 INFO L93 Difference]: Finished difference Result 7499 states and 9089 transitions. [2020-10-27 15:54:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 15:54:28,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 857 [2020-10-27 15:54:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:54:28,362 INFO L225 Difference]: With dead ends: 7499 [2020-10-27 15:54:28,362 INFO L226 Difference]: Without dead ends: 5806 [2020-10-27 15:54:28,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 15:54:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2020-10-27 15:54:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 5806. [2020-10-27 15:54:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5806 states. [2020-10-27 15:54:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 6616 transitions. [2020-10-27 15:54:28,515 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 6616 transitions. Word has length 857 [2020-10-27 15:54:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:54:28,516 INFO L481 AbstractCegarLoop]: Abstraction has 5806 states and 6616 transitions. [2020-10-27 15:54:28,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 15:54:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 6616 transitions. [2020-10-27 15:54:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 891 [2020-10-27 15:54:28,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:54:28,540 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:54:28,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 15:54:28,541 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:54:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:54:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1239718917, now seen corresponding path program 1 times [2020-10-27 15:54:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:54:28,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509013723] [2020-10-27 15:54:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:54:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:28,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:28,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:33,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:33,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 910 [2020-10-27 15:54:33,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:54:33,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-27 15:54:33,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:54:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 15:54:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 621 [2020-10-27 15:54:33,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:35,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:54:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:35,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:35,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:35,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:54:35,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:35,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:54:35,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:35,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:35,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:54:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:35,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:35,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:35,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:54:35,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:54:35,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:35,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:54:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:35,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:35,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:35,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 15:54:35,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:35,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 15:54:35,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:54:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:35,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 15:54:35,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 15:54:39,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509013723] [2020-10-27 15:54:39,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:54:39,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:54:39,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593987147] [2020-10-27 15:54:39,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:54:39,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:54:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:54:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:54:39,902 INFO L87 Difference]: Start difference. First operand 5806 states and 6616 transitions. Second operand 17 states. [2020-10-27 15:54:40,429 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:54:40,628 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:54:41,206 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:54:44,187 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 15:54:44,365 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 15:54:45,511 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 15:54:46,353 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 15:54:47,925 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 15:54:48,084 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:54:48,529 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 15:54:50,280 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 15:54:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:54:51,390 INFO L93 Difference]: Finished difference Result 11493 states and 13338 transitions. [2020-10-27 15:54:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 15:54:51,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 890 [2020-10-27 15:54:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:54:51,418 INFO L225 Difference]: With dead ends: 11493 [2020-10-27 15:54:51,418 INFO L226 Difference]: Without dead ends: 6147 [2020-10-27 15:54:51,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-10-27 15:54:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6147 states. [2020-10-27 15:54:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6147 to 6147. [2020-10-27 15:54:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6147 states. [2020-10-27 15:54:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 6962 transitions. [2020-10-27 15:54:51,576 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 6962 transitions. Word has length 890 [2020-10-27 15:54:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:54:51,577 INFO L481 AbstractCegarLoop]: Abstraction has 6147 states and 6962 transitions. [2020-10-27 15:54:51,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:54:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 6962 transitions. [2020-10-27 15:54:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 937 [2020-10-27 15:54:51,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:54:51,600 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:54:51,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 15:54:51,600 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:54:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:54:51,601 INFO L82 PathProgramCache]: Analyzing trace with hash -422230207, now seen corresponding path program 1 times [2020-10-27 15:54:51,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:54:51,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703996706] [2020-10-27 15:54:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:54:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:51,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:56,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:56,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 960 [2020-10-27 15:54:56,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 15:54:56,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-27 15:54:56,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:54:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 106 [2020-10-27 15:54:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 15:54:56,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:56,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:54:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:56,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:56,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:56,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:54:56,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:56,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:54:56,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:56,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:56,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:56,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:56,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:56,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:54:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:56,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:57,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:57,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:54:57,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:57,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:54:57,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:57,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:57,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:57,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:57,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:57,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:54:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:57,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:57,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 15:54:57,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:57,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:54:57,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:57,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 15:54:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:57,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:57,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:57,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 15:54:57,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:57,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 15:54:57,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:54:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 15:54:57,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:57,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-27 15:54:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:57,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:57,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:54:57,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 15:54:57,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:54:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:54:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 15:54:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-27 15:54:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703996706] [2020-10-27 15:54:57,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:54:57,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:54:57,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832702818] [2020-10-27 15:54:57,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:54:57,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:54:57,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:54:57,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:54:57,622 INFO L87 Difference]: Start difference. First operand 6147 states and 6962 transitions. Second operand 7 states. [2020-10-27 15:55:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:55:06,776 INFO L93 Difference]: Finished difference Result 14223 states and 16608 transitions. [2020-10-27 15:55:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 15:55:06,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 936 [2020-10-27 15:55:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:55:06,835 INFO L225 Difference]: With dead ends: 14223 [2020-10-27 15:55:06,835 INFO L226 Difference]: Without dead ends: 8809 [2020-10-27 15:55:06,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 15:55:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8809 states. [2020-10-27 15:55:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8809 to 8783. [2020-10-27 15:55:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8783 states. [2020-10-27 15:55:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8783 states to 8783 states and 9829 transitions. [2020-10-27 15:55:07,098 INFO L78 Accepts]: Start accepts. Automaton has 8783 states and 9829 transitions. Word has length 936 [2020-10-27 15:55:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:55:07,099 INFO L481 AbstractCegarLoop]: Abstraction has 8783 states and 9829 transitions. [2020-10-27 15:55:07,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 15:55:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8783 states and 9829 transitions. [2020-10-27 15:55:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2020-10-27 15:55:07,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:55:07,129 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 15:55:07,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 15:55:07,129 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:55:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:55:07,130 INFO L82 PathProgramCache]: Analyzing trace with hash -555541788, now seen corresponding path program 1 times [2020-10-27 15:55:07,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:55:07,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465959385] [2020-10-27 15:55:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:55:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:07,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:07,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:08,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:12,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:12,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 975 [2020-10-27 15:55:12,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 15:55:12,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 15:55:12,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:12,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 15:55:12,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 144 [2020-10-27 15:55:12,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 749 [2020-10-27 15:55:12,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:14,132 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-27 15:55:14,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:55:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:14,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:14,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:14,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:55:14,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:14,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:55:14,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:14,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:14,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:55:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:14,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:14,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:14,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:55:14,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:14,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:55:14,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:14,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:14,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:14,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:14,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:14,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:55:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:14,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:14,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:14,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 15:55:14,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:14,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 15:55:14,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:55:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 15:55:14,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 15:55:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465959385] [2020-10-27 15:55:20,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:55:20,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 15:55:20,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177009225] [2020-10-27 15:55:20,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 15:55:20,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:55:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 15:55:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-27 15:55:20,656 INFO L87 Difference]: Start difference. First operand 8783 states and 9829 transitions. Second operand 19 states. [2020-10-27 15:55:21,703 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:55:21,931 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:55:23,917 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:55:26,977 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 15:55:27,172 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 15:55:29,429 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 15:55:30,519 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 15:55:31,453 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 15:55:32,308 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 15:55:32,487 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 15:55:36,956 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 15:55:37,149 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:55:38,333 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 15:55:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:55:38,460 INFO L93 Difference]: Finished difference Result 17579 states and 20010 transitions. [2020-10-27 15:55:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:55:38,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 955 [2020-10-27 15:55:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:55:38,489 INFO L225 Difference]: With dead ends: 17579 [2020-10-27 15:55:38,489 INFO L226 Difference]: Without dead ends: 9523 [2020-10-27 15:55:38,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2020-10-27 15:55:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2020-10-27 15:55:38,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 9517. [2020-10-27 15:55:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9517 states. [2020-10-27 15:55:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9517 states to 9517 states and 10570 transitions. [2020-10-27 15:55:38,721 INFO L78 Accepts]: Start accepts. Automaton has 9517 states and 10570 transitions. Word has length 955 [2020-10-27 15:55:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:55:38,722 INFO L481 AbstractCegarLoop]: Abstraction has 9517 states and 10570 transitions. [2020-10-27 15:55:38,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 15:55:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 9517 states and 10570 transitions. [2020-10-27 15:55:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2020-10-27 15:55:38,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:55:38,756 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 15:55:38,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 15:55:38,757 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:55:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:55:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash 245309945, now seen corresponding path program 1 times [2020-10-27 15:55:38,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:55:38,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912084758] [2020-10-27 15:55:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:55:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:38,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:39,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:39,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:43,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:43,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 984 [2020-10-27 15:55:43,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:55:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-27 15:55:43,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:55:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 15:55:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 547 [2020-10-27 15:55:43,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:46,145 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-27 15:55:46,299 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 15:55:46,455 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 15:55:46,618 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 15:55:46,797 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-27 15:55:46,973 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-27 15:55:47,137 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-27 15:55:47,316 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-27 15:55:47,524 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-27 15:55:47,782 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 47 [2020-10-27 15:55:48,005 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 43 [2020-10-27 15:55:48,209 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 41 [2020-10-27 15:55:48,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:55:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:48,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:48,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:55:48,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:48,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:55:48,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:48,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:48,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:48,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:55:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:48,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:48,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:48,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:55:48,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:48,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:55:48,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:48,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:48,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:55:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:48,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:48,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:48,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 15:55:48,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:48,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 15:55:48,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:55:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 15:55:48,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 15:55:55,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912084758] [2020-10-27 15:55:55,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:55:55,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:55:55,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23226108] [2020-10-27 15:55:55,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:55:55,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:55:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:55:55,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:55:55,828 INFO L87 Difference]: Start difference. First operand 9517 states and 10570 transitions. Second operand 17 states. [2020-10-27 15:55:57,329 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 15:55:57,590 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 15:56:03,214 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 15:56:03,470 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 15:56:05,617 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 15:56:06,464 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 144 [2020-10-27 15:56:10,104 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 15:56:10,362 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 15:56:11,326 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 135 [2020-10-27 15:56:13,089 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 132 [2020-10-27 15:56:13,583 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 127 [2020-10-27 15:56:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:56:15,486 INFO L93 Difference]: Finished difference Result 18847 states and 21209 transitions. [2020-10-27 15:56:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 15:56:15,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 964 [2020-10-27 15:56:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:56:15,514 INFO L225 Difference]: With dead ends: 18847 [2020-10-27 15:56:15,514 INFO L226 Difference]: Without dead ends: 10063 [2020-10-27 15:56:15,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2020-10-27 15:56:15,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10063 states. [2020-10-27 15:56:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10063 to 10057. [2020-10-27 15:56:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10057 states. [2020-10-27 15:56:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10057 states to 10057 states and 11116 transitions. [2020-10-27 15:56:15,730 INFO L78 Accepts]: Start accepts. Automaton has 10057 states and 11116 transitions. Word has length 964 [2020-10-27 15:56:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:56:15,731 INFO L481 AbstractCegarLoop]: Abstraction has 10057 states and 11116 transitions. [2020-10-27 15:56:15,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:56:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 10057 states and 11116 transitions. [2020-10-27 15:56:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2020-10-27 15:56:15,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:56:15,892 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 15:56:15,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 15:56:15,893 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:56:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:56:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash 437626822, now seen corresponding path program 1 times [2020-10-27 15:56:15,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:56:15,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691481967] [2020-10-27 15:56:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:56:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:16,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:16,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:16,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:18,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:21,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:21,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 993 [2020-10-27 15:56:21,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 15:56:21,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 15:56:21,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:21,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:56:21,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 15:56:21,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 15:56:21,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:21,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:56:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:21,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:21,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:21,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:56:21,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:56:21,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:56:21,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:56:21,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:56:21,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:56:21,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:21,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:56:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:21,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:21,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:21,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:56:21,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:56:21,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:56:21,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:21,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:56:21,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:56:21,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:56:21,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:21,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:56:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:21,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:21,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:21,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 15:56:21,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:56:21,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 15:56:21,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:56:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:56:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 15:56:21,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:21,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-27 15:56:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:21,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:21,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:21,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:56:21,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:56:21,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 15:56:21,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:21,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:56:21,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:56:21,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 15:56:21,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 15:56:22,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691481967] [2020-10-27 15:56:22,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:56:22,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:56:22,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132231613] [2020-10-27 15:56:22,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:56:22,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:56:22,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:56:22,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:56:22,037 INFO L87 Difference]: Start difference. First operand 10057 states and 11116 transitions. Second operand 7 states.