/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:36:47,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:36:47,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:36:47,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:36:47,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:36:47,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:36:47,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:36:47,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:36:47,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:36:47,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:36:47,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:36:47,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:36:47,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:36:47,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:36:47,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:36:47,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:36:47,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:36:47,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:36:47,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:36:47,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:36:47,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:36:47,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:36:47,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:36:47,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:36:47,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:36:47,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:36:47,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:36:47,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:36:47,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:36:47,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:36:47,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:36:47,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:36:47,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:36:47,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:36:47,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:36:47,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:36:47,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:36:47,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:36:47,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:36:47,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:36:47,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:36:47,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:36:47,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:36:47,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:36:47,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:36:47,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:36:47,377 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:36:47,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:36:47,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:36:47,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:36:47,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:36:47,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:36:47,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:36:47,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:36:47,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:36:47,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:36:47,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:36:47,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:36:47,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:36:47,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:36:47,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:36:47,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:36:47,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:36:47,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:36:47,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:36:47,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:36:47,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:36:47,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:36:47,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:36:47,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:36:47,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:36:47,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:36:47,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:36:47,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:36:47,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:36:47,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:36:47,836 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:36:47,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label11.c [2020-10-26 23:36:47,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d779b42f/3c6b38ff9db74e8783cd530a9dbfb77a/FLAGd23f0014b [2020-10-26 23:36:48,972 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:36:48,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label11.c [2020-10-26 23:36:49,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d779b42f/3c6b38ff9db74e8783cd530a9dbfb77a/FLAGd23f0014b [2020-10-26 23:36:49,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d779b42f/3c6b38ff9db74e8783cd530a9dbfb77a [2020-10-26 23:36:49,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:36:49,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:36:49,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:36:49,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:36:49,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:36:49,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:36:49" (1/1) ... [2020-10-26 23:36:49,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@847d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:49, skipping insertion in model container [2020-10-26 23:36:49,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:36:49" (1/1) ... [2020-10-26 23:36:49,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:36:49,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:36:50,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:36:50,043 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:36:50,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:36:50,475 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:36:50,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50 WrapperNode [2020-10-26 23:36:50,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:36:50,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:36:50,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:36:50,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:36:50,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (1/1) ... [2020-10-26 23:36:50,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (1/1) ... [2020-10-26 23:36:50,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (1/1) ... [2020-10-26 23:36:50,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (1/1) ... [2020-10-26 23:36:50,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (1/1) ... [2020-10-26 23:36:50,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (1/1) ... [2020-10-26 23:36:50,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (1/1) ... [2020-10-26 23:36:50,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:36:50,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:36:50,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:36:50,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:36:50,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (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 [2020-10-26 23:36:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:36:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:36:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:36:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:36:50,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:36:50,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:36:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:36:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:36:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:36:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:36:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:36:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:36:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:36:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:36:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:36:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:36:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:36:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:36:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:36:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:36:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:36:54,592 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:36:54,592 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:36:54,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:36:54 BoogieIcfgContainer [2020-10-26 23:36:54,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:36:54,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:36:54,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:36:54,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:36:54,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:36:49" (1/3) ... [2020-10-26 23:36:54,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a504875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:36:54, skipping insertion in model container [2020-10-26 23:36:54,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:50" (2/3) ... [2020-10-26 23:36:54,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a504875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:36:54, skipping insertion in model container [2020-10-26 23:36:54,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:36:54" (3/3) ... [2020-10-26 23:36:54,606 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label11.c [2020-10-26 23:36:54,620 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:36:54,627 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:36:54,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:36:54,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:36:54,679 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:36:54,679 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:36:54,679 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:36:54,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:36:54,680 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:36:54,680 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:36:54,680 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:36:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:36:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 23:36:54,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:36:54,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:36:54,724 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:36:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:36:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1254674729, now seen corresponding path program 1 times [2020-10-26 23:36:54,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:36:54,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631312777] [2020-10-26 23:36:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:36:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:55,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:55,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:55,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 23:36:55,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:55,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-26 23:36:55,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:55,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:36:55,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:36:55,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-26 23:36:55,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:36:55,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:36:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:36:55,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:36:55,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:36:55,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:36:55,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:36:55,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:36:55,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:36:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:36:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:36:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:36:55,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:36:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:36:55,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631312777] [2020-10-26 23:36:55,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:36:55,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:36:55,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750989816] [2020-10-26 23:36:55,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:36:55,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:36:55,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:36:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:36:55,890 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:37:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:02,102 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-26 23:37:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:37:02,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-26 23:37:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:02,132 INFO L225 Difference]: With dead ends: 1208 [2020-10-26 23:37:02,132 INFO L226 Difference]: Without dead ends: 703 [2020-10-26 23:37:02,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:37:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-26 23:37:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-26 23:37:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-26 23:37:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-26 23:37:02,280 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 62 [2020-10-26 23:37:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:02,281 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-26 23:37:02,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:37:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-26 23:37:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-26 23:37:02,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:02,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:02,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:37:02,294 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1917730371, now seen corresponding path program 1 times [2020-10-26 23:37:02,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:02,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965673056] [2020-10-26 23:37:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:03,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:04,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:04,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:04,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 23:37:04,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:37:04,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-10-26 23:37:04,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 23:37:04,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:37:04,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:04,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:04,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:04,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:04,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:37:04,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:04,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:04,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:04,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:04,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:04,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 23:37:04,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:04,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-26 23:37:04,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:04,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:04,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:04,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:37:04,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:37:04,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965673056] [2020-10-26 23:37:04,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:37:04,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:37:04,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672123056] [2020-10-26 23:37:04,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:37:04,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:04,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:37:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:04,920 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 7 states. [2020-10-26 23:37:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:15,785 INFO L93 Difference]: Finished difference Result 2050 states and 3001 transitions. [2020-10-26 23:37:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:37:15,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2020-10-26 23:37:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:15,801 INFO L225 Difference]: With dead ends: 2050 [2020-10-26 23:37:15,802 INFO L226 Difference]: Without dead ends: 1359 [2020-10-26 23:37:15,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:37:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2020-10-26 23:37:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1325. [2020-10-26 23:37:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-10-26 23:37:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1715 transitions. [2020-10-26 23:37:15,863 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1715 transitions. Word has length 141 [2020-10-26 23:37:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:15,864 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 1715 transitions. [2020-10-26 23:37:15,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:37:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1715 transitions. [2020-10-26 23:37:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-26 23:37:15,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:15,871 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:15,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:37:15,872 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1853648959, now seen corresponding path program 1 times [2020-10-26 23:37:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:15,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590383633] [2020-10-26 23:37:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:16,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:16,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:16,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:20,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:20,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-26 23:37:20,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:37:20,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4016 [2020-10-26 23:37:20,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:20,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:37:20,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:20,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 265 [2020-10-26 23:37:20,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:20,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:20,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:20,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:20,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:20,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:20,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:37:20,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:20,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:20,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:20,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:20,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:20,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:37:20,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:20,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-26 23:37:20,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:20,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:20,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:20,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:37:20,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:37:21,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590383633] [2020-10-26 23:37:21,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:37:21,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:37:21,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94874665] [2020-10-26 23:37:21,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:37:21,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:37:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:37:21,157 INFO L87 Difference]: Start difference. First operand 1325 states and 1715 transitions. Second operand 6 states. [2020-10-26 23:37:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:29,649 INFO L93 Difference]: Finished difference Result 1971 states and 2439 transitions. [2020-10-26 23:37:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:37:29,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 262 [2020-10-26 23:37:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:29,661 INFO L225 Difference]: With dead ends: 1971 [2020-10-26 23:37:29,662 INFO L226 Difference]: Without dead ends: 1968 [2020-10-26 23:37:29,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:37:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2020-10-26 23:37:29,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1945. [2020-10-26 23:37:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2020-10-26 23:37:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2409 transitions. [2020-10-26 23:37:29,725 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2409 transitions. Word has length 262 [2020-10-26 23:37:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:29,727 INFO L481 AbstractCegarLoop]: Abstraction has 1945 states and 2409 transitions. [2020-10-26 23:37:29,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:37:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2409 transitions. [2020-10-26 23:37:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-26 23:37:29,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:29,736 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:29,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:37:29,737 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:29,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:29,737 INFO L82 PathProgramCache]: Analyzing trace with hash -304106780, now seen corresponding path program 1 times [2020-10-26 23:37:29,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:29,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794079838] [2020-10-26 23:37:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:29,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:30,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:32,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:34,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:34,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-26 23:37:34,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:37:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-26 23:37:34,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:37:34,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:35,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:35,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:35,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:35,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:35,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:37:35,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:35,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:35,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:35,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:35,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:35,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:37:35,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:35,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-26 23:37:35,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:35,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:37:35,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:36,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 23:37:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:36,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:36,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:36,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:37:36,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:36,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 23:37:36,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:36,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:37:36,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 23:37:36,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:37:36,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 23:37:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 108 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:37:36,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794079838] [2020-10-26 23:37:36,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:37:36,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:37:36,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289819371] [2020-10-26 23:37:36,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:37:36,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:37:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:36,624 INFO L87 Difference]: Start difference. First operand 1945 states and 2409 transitions. Second operand 7 states. [2020-10-26 23:37:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:49,937 INFO L93 Difference]: Finished difference Result 4233 states and 5236 transitions. [2020-10-26 23:37:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:37:49,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 342 [2020-10-26 23:37:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:49,961 INFO L225 Difference]: With dead ends: 4233 [2020-10-26 23:37:49,961 INFO L226 Difference]: Without dead ends: 2601 [2020-10-26 23:37:49,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:37:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2020-10-26 23:37:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2581. [2020-10-26 23:37:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2581 states. [2020-10-26 23:37:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3082 transitions. [2020-10-26 23:37:50,069 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3082 transitions. Word has length 342 [2020-10-26 23:37:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:50,070 INFO L481 AbstractCegarLoop]: Abstraction has 2581 states and 3082 transitions. [2020-10-26 23:37:50,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:37:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3082 transitions. [2020-10-26 23:37:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-10-26 23:37:50,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:50,080 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:50,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:37:50,080 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash -568934597, now seen corresponding path program 1 times [2020-10-26 23:37:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:50,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877422311] [2020-10-26 23:37:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:50,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:50,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:53,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:53,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-10-26 23:37:53,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:37:53,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3074 [2020-10-26 23:37:53,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:53,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:37:53,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:37:53,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:53,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:53,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:53,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:53,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:53,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:37:53,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:37:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:37:53,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:53,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:53,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:53,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:53,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:37:53,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:53,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-26 23:37:53,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:53,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:53,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:37:53,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:54,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:37:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:54,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:54,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:54,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:37:54,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:54,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 23:37:54,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:54,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:54,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:54,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:37:54,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:37:54,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877422311] [2020-10-26 23:37:54,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:37:54,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:37:54,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351543224] [2020-10-26 23:37:54,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:37:54,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:37:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:54,686 INFO L87 Difference]: Start difference. First operand 2581 states and 3082 transitions. Second operand 7 states. [2020-10-26 23:38:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:08,478 INFO L93 Difference]: Finished difference Result 5867 states and 7292 transitions. [2020-10-26 23:38:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:38:08,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 416 [2020-10-26 23:38:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:08,501 INFO L225 Difference]: With dead ends: 5867 [2020-10-26 23:38:08,501 INFO L226 Difference]: Without dead ends: 3599 [2020-10-26 23:38:08,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:38:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2020-10-26 23:38:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 3543. [2020-10-26 23:38:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3543 states. [2020-10-26 23:38:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 4215 transitions. [2020-10-26 23:38:08,633 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 4215 transitions. Word has length 416 [2020-10-26 23:38:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:08,636 INFO L481 AbstractCegarLoop]: Abstraction has 3543 states and 4215 transitions. [2020-10-26 23:38:08,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:38:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 4215 transitions. [2020-10-26 23:38:08,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-26 23:38:08,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:08,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:38:08,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:38:08,649 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash -71904856, now seen corresponding path program 1 times [2020-10-26 23:38:08,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:08,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489200001] [2020-10-26 23:38:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:08,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:09,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:11,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:11,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 461 [2020-10-26 23:38:11,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:11,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2847 [2020-10-26 23:38:11,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:11,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:11,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:38:11,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:38:11,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:11,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:11,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:11,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:11,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:11,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:11,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:38:11,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:11,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:11,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:11,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:11,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:12,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:12,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:38:12,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:12,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-26 23:38:12,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:38:12,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:12,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:38:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:12,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:12,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:12,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:38:12,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:12,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-26 23:38:12,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:38:12,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:38:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 216 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:38:13,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489200001] [2020-10-26 23:38:13,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:13,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:38:13,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795053965] [2020-10-26 23:38:13,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:38:13,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:13,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:38:13,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:38:13,201 INFO L87 Difference]: Start difference. First operand 3543 states and 4215 transitions. Second operand 7 states. [2020-10-26 23:38:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:30,496 INFO L93 Difference]: Finished difference Result 8430 states and 10058 transitions. [2020-10-26 23:38:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:38:30,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 447 [2020-10-26 23:38:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:30,520 INFO L225 Difference]: With dead ends: 8430 [2020-10-26 23:38:30,520 INFO L226 Difference]: Without dead ends: 4879 [2020-10-26 23:38:30,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:38:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2020-10-26 23:38:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4818. [2020-10-26 23:38:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4818 states. [2020-10-26 23:38:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 5574 transitions. [2020-10-26 23:38:30,658 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 5574 transitions. Word has length 447 [2020-10-26 23:38:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:30,659 INFO L481 AbstractCegarLoop]: Abstraction has 4818 states and 5574 transitions. [2020-10-26 23:38:30,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:38:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 5574 transitions. [2020-10-26 23:38:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-10-26 23:38:30,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:30,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:38:30,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:38:30,666 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:30,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1332030752, now seen corresponding path program 1 times [2020-10-26 23:38:30,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:30,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076179338] [2020-10-26 23:38:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:30,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:31,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:31,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-10-26 23:38:31,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:31,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-26 23:38:31,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:38:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 23:38:31,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:31,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:31,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:31,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:31,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:31,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:31,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:38:31,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:31,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:31,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:32,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:32,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:38:32,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:32,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-26 23:38:32,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:32,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:32,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:38:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:32,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:32,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:38:32,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:32,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 23:38:32,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:32,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:32,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:32,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:38:32,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 23:38:32,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076179338] [2020-10-26 23:38:32,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:32,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:38:32,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729901037] [2020-10-26 23:38:32,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:38:32,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:38:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:38:32,419 INFO L87 Difference]: Start difference. First operand 4818 states and 5574 transitions. Second operand 5 states. [2020-10-26 23:38:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:40,634 INFO L93 Difference]: Finished difference Result 10271 states and 12220 transitions. [2020-10-26 23:38:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:38:40,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 459 [2020-10-26 23:38:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:40,663 INFO L225 Difference]: With dead ends: 10271 [2020-10-26 23:38:40,663 INFO L226 Difference]: Without dead ends: 5766 [2020-10-26 23:38:40,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:38:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2020-10-26 23:38:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5758. [2020-10-26 23:38:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5758 states. [2020-10-26 23:38:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5758 states to 5758 states and 6640 transitions. [2020-10-26 23:38:40,824 INFO L78 Accepts]: Start accepts. Automaton has 5758 states and 6640 transitions. Word has length 459 [2020-10-26 23:38:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:40,825 INFO L481 AbstractCegarLoop]: Abstraction has 5758 states and 6640 transitions. [2020-10-26 23:38:40,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:38:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5758 states and 6640 transitions. [2020-10-26 23:38:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2020-10-26 23:38:40,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:40,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:38:40,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:38:40,835 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:40,836 INFO L82 PathProgramCache]: Analyzing trace with hash -397154702, now seen corresponding path program 1 times [2020-10-26 23:38:40,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:40,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641510360] [2020-10-26 23:38:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:41,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:41,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:45,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:45,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 576 [2020-10-26 23:38:45,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:38:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4435 [2020-10-26 23:38:45,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:38:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:38:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-26 23:38:45,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:45,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:45,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:45,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:45,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:45,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:38:45,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:45,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:45,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:45,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:38:45,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:45,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 23:38:45,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:45,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:45,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:45,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:45,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:45,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:38:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:45,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:45,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:45,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:38:45,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:45,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 23:38:45,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:45,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:45,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:38:45,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:46,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:38:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:46,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:46,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:46,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:46,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 23:38:46,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:46,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-26 23:38:46,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:46,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:46,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:46,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 23:38:46,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 306 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-26 23:38:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641510360] [2020-10-26 23:38:46,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:46,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:38:46,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538699954] [2020-10-26 23:38:46,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:38:46,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:38:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:38:46,635 INFO L87 Difference]: Start difference. First operand 5758 states and 6640 transitions. Second operand 6 states. [2020-10-26 23:38:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:56,590 INFO L93 Difference]: Finished difference Result 10045 states and 12385 transitions. [2020-10-26 23:38:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:38:56,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 560 [2020-10-26 23:38:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:56,638 INFO L225 Difference]: With dead ends: 10045 [2020-10-26 23:38:56,639 INFO L226 Difference]: Without dead ends: 7713 [2020-10-26 23:38:56,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:38:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7713 states. [2020-10-26 23:38:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7713 to 7378. [2020-10-26 23:38:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7378 states. [2020-10-26 23:38:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 8820 transitions. [2020-10-26 23:38:56,849 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 8820 transitions. Word has length 560 [2020-10-26 23:38:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:56,850 INFO L481 AbstractCegarLoop]: Abstraction has 7378 states and 8820 transitions. [2020-10-26 23:38:56,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:38:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 8820 transitions. [2020-10-26 23:38:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2020-10-26 23:38:56,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:56,862 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:38:56,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:38:56,862 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:56,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1094305129, now seen corresponding path program 1 times [2020-10-26 23:38:56,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:56,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682108772] [2020-10-26 23:38:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:57,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:57,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:58,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:01,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:01,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 603 [2020-10-26 23:39:01,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:39:01,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4240 [2020-10-26 23:39:01,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:39:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:39:01,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:01,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:01,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:01,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:01,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:01,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:01,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:39:01,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:01,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:01,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:01,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:01,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:01,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:01,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:01,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:01,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:39:01,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:01,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 23:39:01,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:01,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:01,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:01,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:01,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:01,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:39:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:01,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:01,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:01,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:39:01,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 23:39:01,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:39:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:01,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:39:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:01,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:01,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:39:01,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:39:02,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682108772] [2020-10-26 23:39:02,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:02,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:39:02,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312444254] [2020-10-26 23:39:02,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:39:02,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:39:02,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:39:02,274 INFO L87 Difference]: Start difference. First operand 7378 states and 8820 transitions. Second operand 7 states. [2020-10-26 23:39:06,075 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:39:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:16,319 INFO L93 Difference]: Finished difference Result 17433 states and 22338 transitions. [2020-10-26 23:39:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:39:16,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 587 [2020-10-26 23:39:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:16,368 INFO L225 Difference]: With dead ends: 17433 [2020-10-26 23:39:16,368 INFO L226 Difference]: Without dead ends: 10982 [2020-10-26 23:39:16,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:39:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10982 states. [2020-10-26 23:39:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10982 to 10904. [2020-10-26 23:39:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10904 states. [2020-10-26 23:39:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10904 states to 10904 states and 13022 transitions. [2020-10-26 23:39:16,686 INFO L78 Accepts]: Start accepts. Automaton has 10904 states and 13022 transitions. Word has length 587 [2020-10-26 23:39:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:16,688 INFO L481 AbstractCegarLoop]: Abstraction has 10904 states and 13022 transitions. [2020-10-26 23:39:16,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:39:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 10904 states and 13022 transitions. [2020-10-26 23:39:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2020-10-26 23:39:16,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:16,700 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:39:16,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:39:16,700 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1155429573, now seen corresponding path program 1 times [2020-10-26 23:39:16,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:16,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145081594] [2020-10-26 23:39:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:17,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:17,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:19,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:19,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 637 [2020-10-26 23:39:19,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:39:19,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2776 [2020-10-26 23:39:19,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:19,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:19,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 491 [2020-10-26 23:39:19,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:39:19,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:19,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:19,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:19,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:19,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:19,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:19,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:39:19,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:19,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:19,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:19,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:19,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:19,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:19,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:20,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:20,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:39:20,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:20,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 23:39:20,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:20,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:20,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:39:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:20,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:20,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:20,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 23:39:20,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-26 23:39:20,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-26 23:39:20,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:20,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2020-10-26 23:39:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:20,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:20,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:20,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:39:20,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:20,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 23:39:20,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:39:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 321 proven. 2 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-26 23:39:20,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145081594] [2020-10-26 23:39:20,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:20,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:39:20,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071757467] [2020-10-26 23:39:20,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:39:20,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:20,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:39:20,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:39:20,934 INFO L87 Difference]: Start difference. First operand 10904 states and 13022 transitions. Second operand 7 states. [2020-10-26 23:39:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:32,999 INFO L93 Difference]: Finished difference Result 23420 states and 28830 transitions. [2020-10-26 23:39:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:39:33,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 621 [2020-10-26 23:39:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:33,048 INFO L225 Difference]: With dead ends: 23420 [2020-10-26 23:39:33,048 INFO L226 Difference]: Without dead ends: 12829 [2020-10-26 23:39:33,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:39:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12829 states. [2020-10-26 23:39:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12829 to 12503. [2020-10-26 23:39:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12503 states. [2020-10-26 23:39:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 14888 transitions. [2020-10-26 23:39:33,372 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 14888 transitions. Word has length 621 [2020-10-26 23:39:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:33,373 INFO L481 AbstractCegarLoop]: Abstraction has 12503 states and 14888 transitions. [2020-10-26 23:39:33,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:39:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 14888 transitions. [2020-10-26 23:39:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2020-10-26 23:39:33,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:33,386 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:39:33,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:39:33,386 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:33,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1983523514, now seen corresponding path program 1 times [2020-10-26 23:39:33,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:33,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870107230] [2020-10-26 23:39:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:33,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:33,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:34,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:38,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:38,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 644 [2020-10-26 23:39:38,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:39:38,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 23:39:38,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:38,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 23:39:38,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:39:38,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-26 23:39:38,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:38,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:38,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:38,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:38,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:38,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:38,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:39:38,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:38,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:38,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:38,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:39,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:39,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:39:39,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:39,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-26 23:39:39,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:39,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:39,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:39,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:39:39,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:39:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:39,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:39,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:39,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:39:39,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:39,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 23:39:39,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:39,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:39:39,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:39:39,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:39,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:39:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:39,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:39,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:39,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 23:39:39,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 23:39:39,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:39:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 23:39:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:39,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-10-26 23:39:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:39,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:39,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:39,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 23:39:39,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:39:39,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-26 23:39:39,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:39,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:39,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:39,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-26 23:39:39,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 555 proven. 107 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-26 23:39:40,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870107230] [2020-10-26 23:39:40,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:40,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:39:40,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891623641] [2020-10-26 23:39:40,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 23:39:40,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:40,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 23:39:40,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:39:40,468 INFO L87 Difference]: Start difference. First operand 12503 states and 14888 transitions. Second operand 11 states. [2020-10-26 23:39:41,024 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-26 23:39:43,938 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-26 23:39:44,359 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-26 23:39:44,941 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-26 23:39:46,093 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-26 23:40:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:05,782 INFO L93 Difference]: Finished difference Result 31123 states and 39726 transitions. [2020-10-26 23:40:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 23:40:05,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 626 [2020-10-26 23:40:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:05,863 INFO L225 Difference]: With dead ends: 31123 [2020-10-26 23:40:05,863 INFO L226 Difference]: Without dead ends: 22239 [2020-10-26 23:40:05,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-26 23:40:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22239 states. [2020-10-26 23:40:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22239 to 20320. [2020-10-26 23:40:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20320 states. [2020-10-26 23:40:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20320 states to 20320 states and 26204 transitions. [2020-10-26 23:40:06,567 INFO L78 Accepts]: Start accepts. Automaton has 20320 states and 26204 transitions. Word has length 626 [2020-10-26 23:40:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:06,568 INFO L481 AbstractCegarLoop]: Abstraction has 20320 states and 26204 transitions. [2020-10-26 23:40:06,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 23:40:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20320 states and 26204 transitions. [2020-10-26 23:40:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2020-10-26 23:40:06,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:06,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:40:06,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:40:06,584 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1518273425, now seen corresponding path program 1 times [2020-10-26 23:40:06,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:06,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166983471] [2020-10-26 23:40:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:07,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:08,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:08,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 649 [2020-10-26 23:40:08,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:08,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-10-26 23:40:08,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:08,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:08,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:40:08,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-26 23:40:08,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:09,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:09,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:09,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:09,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:09,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:09,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:40:09,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:09,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:09,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:09,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:09,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:09,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:09,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:09,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:09,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:40:09,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:09,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 23:40:09,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:09,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:09,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:40:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:09,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:09,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:09,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:40:09,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-26 23:40:09,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:40:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:09,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:40:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-26 23:40:09,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 389 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-26 23:40:10,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166983471] [2020-10-26 23:40:10,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:10,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:40:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967167968] [2020-10-26 23:40:10,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:40:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:40:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:40:10,023 INFO L87 Difference]: Start difference. First operand 20320 states and 26204 transitions. Second operand 6 states. [2020-10-26 23:40:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:28,658 INFO L93 Difference]: Finished difference Result 46692 states and 62479 transitions. [2020-10-26 23:40:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:40:28,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 633 [2020-10-26 23:40:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:28,769 INFO L225 Difference]: With dead ends: 46692 [2020-10-26 23:40:28,769 INFO L226 Difference]: Without dead ends: 31338 [2020-10-26 23:40:28,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:40:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31338 states. [2020-10-26 23:40:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31338 to 31323. [2020-10-26 23:40:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31323 states. [2020-10-26 23:40:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31323 states to 31323 states and 40864 transitions. [2020-10-26 23:40:29,944 INFO L78 Accepts]: Start accepts. Automaton has 31323 states and 40864 transitions. Word has length 633 [2020-10-26 23:40:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:29,945 INFO L481 AbstractCegarLoop]: Abstraction has 31323 states and 40864 transitions. [2020-10-26 23:40:29,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:40:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 31323 states and 40864 transitions. [2020-10-26 23:40:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2020-10-26 23:40:29,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:29,966 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:29,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:40:29,966 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:29,968 INFO L82 PathProgramCache]: Analyzing trace with hash 215629804, now seen corresponding path program 1 times [2020-10-26 23:40:29,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:29,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884725254] [2020-10-26 23:40:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:30,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:30,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:31,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking...