/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/Problem03_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:48:12,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:48:12,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:48:12,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:48:12,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:48:12,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:48:12,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:48:12,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:48:12,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:48:12,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:48:12,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:48:12,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:48:12,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:48:12,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:48:12,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:48:12,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:48:12,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:48:12,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:48:12,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:48:12,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:48:12,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:48:12,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:48:12,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:48:12,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:48:12,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:48:12,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:48:12,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:48:12,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:48:12,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:48:12,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:48:12,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:48:12,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:48:12,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:48:12,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:48:12,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:48:12,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:48:12,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:48:12,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:48:12,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:48:12,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:48:12,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:48:12,279 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 20:48:12,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:48:12,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:48:12,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:48:12,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:48:12,309 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:48:12,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:48:12,310 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:48:12,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:48:12,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:48:12,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:48:12,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:48:12,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:48:12,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:48:12,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:48:12,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:48:12,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:48:12,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:48:12,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:48:12,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:48:12,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:48:12,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:48:12,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:48:12,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:48:12,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:48:12,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:48:12,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:48:12,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:48:12,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:48:12,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:48:12,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:48:12,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:48:12,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:48:12,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:48:12,740 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:48:12,741 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:48:12,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label32.c [2020-10-26 20:48:12,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3ba3e3a2/4c8d427bdf7140c7a75c0bdce35009c2/FLAGd52e036b8 [2020-10-26 20:48:13,796 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:48:13,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label32.c [2020-10-26 20:48:13,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3ba3e3a2/4c8d427bdf7140c7a75c0bdce35009c2/FLAGd52e036b8 [2020-10-26 20:48:14,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3ba3e3a2/4c8d427bdf7140c7a75c0bdce35009c2 [2020-10-26 20:48:14,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:48:14,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:48:14,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:14,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:48:14,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:48:14,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:14" (1/1) ... [2020-10-26 20:48:14,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b6bd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:14, skipping insertion in model container [2020-10-26 20:48:14,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:14" (1/1) ... [2020-10-26 20:48:14,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:48:14,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:48:15,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:15,281 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:48:15,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:15,567 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:48:15,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15 WrapperNode [2020-10-26 20:48:15,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:15,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:48:15,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:48:15,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:48:15,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (1/1) ... [2020-10-26 20:48:15,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (1/1) ... [2020-10-26 20:48:15,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (1/1) ... [2020-10-26 20:48:15,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (1/1) ... [2020-10-26 20:48:15,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (1/1) ... [2020-10-26 20:48:15,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (1/1) ... [2020-10-26 20:48:15,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (1/1) ... [2020-10-26 20:48:15,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:48:15,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:48:15,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:48:15,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:48:15,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (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 20:48:15,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:48:15,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:48:15,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:48:15,877 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:48:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:48:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:48:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:48:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:48:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:48:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:48:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:48:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:48:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:48:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:48:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:48:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:48:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:48:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:48:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:48:18,063 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:48:18,063 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:48:18,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:18 BoogieIcfgContainer [2020-10-26 20:48:18,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:48:18,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:48:18,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:48:18,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:48:18,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:48:14" (1/3) ... [2020-10-26 20:48:18,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e579429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:18, skipping insertion in model container [2020-10-26 20:48:18,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:15" (2/3) ... [2020-10-26 20:48:18,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e579429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:18, skipping insertion in model container [2020-10-26 20:48:18,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:18" (3/3) ... [2020-10-26 20:48:18,076 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label32.c [2020-10-26 20:48:18,089 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:48:18,095 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:48:18,111 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:48:18,142 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:48:18,142 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:48:18,142 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:48:18,142 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:48:18,143 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:48:18,143 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:48:18,143 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:48:18,143 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:48:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:48:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-26 20:48:18,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:18,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:18,190 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1637693792, now seen corresponding path program 1 times [2020-10-26 20:48:18,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:18,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403000388] [2020-10-26 20:48:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:18,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:19,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:22,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:22,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-26 20:48:22,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:22,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4138 [2020-10-26 20:48:22,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-26 20:48:22,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:48:23,323 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:23,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:23,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:23,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:23,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:23,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:23,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:48:23,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:23,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:23,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:23,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:23,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:23,501 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 20:48:23,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403000388] [2020-10-26 20:48:23,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:23,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:48:23,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065909539] [2020-10-26 20:48:23,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:48:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:48:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:48:23,536 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-26 20:48:23,797 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:27,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:27,650 INFO L93 Difference]: Finished difference Result 889 states and 1542 transitions. [2020-10-26 20:48:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:48:27,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 196 [2020-10-26 20:48:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:27,673 INFO L225 Difference]: With dead ends: 889 [2020-10-26 20:48:27,673 INFO L226 Difference]: Without dead ends: 481 [2020-10-26 20:48:27,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:48:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-26 20:48:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 476. [2020-10-26 20:48:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-26 20:48:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 729 transitions. [2020-10-26 20:48:27,778 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 729 transitions. Word has length 196 [2020-10-26 20:48:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:27,779 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 729 transitions. [2020-10-26 20:48:27,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:48:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 729 transitions. [2020-10-26 20:48:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-26 20:48:27,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:27,788 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:48:27,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:48:27,789 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash 442196753, now seen corresponding path program 1 times [2020-10-26 20:48:27,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:27,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424129641] [2020-10-26 20:48:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:27,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:28,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:29,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:30,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:32,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:32,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 20:48:32,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:48:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4666 [2020-10-26 20:48:32,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:48:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:32,924 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:32,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:32,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:32,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:32,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:32,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:32,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:48:32,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:32,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:33,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:33,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:33,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:48:33,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:33,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:48:33,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:33,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:33,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:33,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:48:33,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:33,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424129641] [2020-10-26 20:48:33,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:33,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:48:33,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401481535] [2020-10-26 20:48:33,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:33,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:33,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:33,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:33,243 INFO L87 Difference]: Start difference. First operand 476 states and 729 transitions. Second operand 7 states. [2020-10-26 20:48:33,509 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:36,971 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:37,892 INFO L93 Difference]: Finished difference Result 1432 states and 2225 transitions. [2020-10-26 20:48:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:48:37,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 205 [2020-10-26 20:48:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:37,903 INFO L225 Difference]: With dead ends: 1432 [2020-10-26 20:48:37,903 INFO L226 Difference]: Without dead ends: 962 [2020-10-26 20:48:37,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:48:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-10-26 20:48:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 941. [2020-10-26 20:48:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 941 states. [2020-10-26 20:48:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1378 transitions. [2020-10-26 20:48:37,991 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1378 transitions. Word has length 205 [2020-10-26 20:48:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:37,994 INFO L481 AbstractCegarLoop]: Abstraction has 941 states and 1378 transitions. [2020-10-26 20:48:37,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:48:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1378 transitions. [2020-10-26 20:48:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-26 20:48:38,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:38,011 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:48:38,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:48:38,012 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash -990772161, now seen corresponding path program 1 times [2020-10-26 20:48:38,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:38,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841690903] [2020-10-26 20:48:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:38,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:39,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:41,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:41,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 20:48:41,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3035 [2020-10-26 20:48:41,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:41,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:41,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:41,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:48:41,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:41,376 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:41,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:41,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:41,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:41,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:41,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:48:41,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:41,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:41,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:41,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:41,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:41,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:48:41,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:41,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:48:41,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:41,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:48:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:41,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841690903] [2020-10-26 20:48:41,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:41,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:48:41,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819329724] [2020-10-26 20:48:41,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:41,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:41,688 INFO L87 Difference]: Start difference. First operand 941 states and 1378 transitions. Second operand 7 states. [2020-10-26 20:48:41,945 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:44,904 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:48:45,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:45,872 INFO L93 Difference]: Finished difference Result 2784 states and 4165 transitions. [2020-10-26 20:48:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:48:45,873 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 208 [2020-10-26 20:48:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:45,891 INFO L225 Difference]: With dead ends: 2784 [2020-10-26 20:48:45,891 INFO L226 Difference]: Without dead ends: 1849 [2020-10-26 20:48:45,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:48:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2020-10-26 20:48:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1808. [2020-10-26 20:48:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1808 states. [2020-10-26 20:48:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2650 transitions. [2020-10-26 20:48:46,016 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2650 transitions. Word has length 208 [2020-10-26 20:48:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:46,017 INFO L481 AbstractCegarLoop]: Abstraction has 1808 states and 2650 transitions. [2020-10-26 20:48:46,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:48:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2650 transitions. [2020-10-26 20:48:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 20:48:46,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:46,033 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:48:46,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:48:46,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:46,035 INFO L82 PathProgramCache]: Analyzing trace with hash 609344377, now seen corresponding path program 1 times [2020-10-26 20:48:46,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:46,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455592985] [2020-10-26 20:48:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:46,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:46,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:47,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:47,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-26 20:48:47,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:47,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-26 20:48:47,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:48:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-26 20:48:47,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:47,485 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:47,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:47,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:47,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:47,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:47,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:47,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:48:47,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:47,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:47,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:47,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:47,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:47,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:47,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:47,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:47,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:48:47,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:47,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:48:47,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:48:47,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:48,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455592985] [2020-10-26 20:48:48,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:48,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:48:48,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873515609] [2020-10-26 20:48:48,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:48:48,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:48:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:48:48,038 INFO L87 Difference]: Start difference. First operand 1808 states and 2650 transitions. Second operand 5 states. [2020-10-26 20:48:48,604 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:48:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:51,726 INFO L93 Difference]: Finished difference Result 3804 states and 5647 transitions. [2020-10-26 20:48:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:48:51,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2020-10-26 20:48:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:51,747 INFO L225 Difference]: With dead ends: 3804 [2020-10-26 20:48:51,747 INFO L226 Difference]: Without dead ends: 1818 [2020-10-26 20:48:51,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:48:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2020-10-26 20:48:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1808. [2020-10-26 20:48:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1808 states. [2020-10-26 20:48:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2541 transitions. [2020-10-26 20:48:51,849 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2541 transitions. Word has length 217 [2020-10-26 20:48:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:51,849 INFO L481 AbstractCegarLoop]: Abstraction has 1808 states and 2541 transitions. [2020-10-26 20:48:51,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:48:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2541 transitions. [2020-10-26 20:48:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 20:48:51,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:51,857 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 20:48:51,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:48:51,858 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash 245542102, now seen corresponding path program 1 times [2020-10-26 20:48:51,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:51,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9771541] [2020-10-26 20:48:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:51,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:52,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:53,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:54,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:56,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:56,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-26 20:48:56,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:48:56,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-26 20:48:56,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:56,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:56,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:56,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:48:56,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:57,265 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:57,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:57,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:57,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:57,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:57,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:48:57,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:57,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:57,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:57,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:57,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:57,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:57,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:57,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:48:57,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:57,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:48:57,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:57,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:57,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:57,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:48:57,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:57,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 20:48:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:57,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:57,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:48:57,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:57,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:48:57,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:57,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:57,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 20:48:57,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:57,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:48:57,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9771541] [2020-10-26 20:48:57,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:57,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:48:57,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762314942] [2020-10-26 20:48:57,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:57,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:57,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:57,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:57,612 INFO L87 Difference]: Start difference. First operand 1808 states and 2541 transitions. Second operand 7 states. [2020-10-26 20:48:57,893 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:48:59,003 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:01,914 INFO L93 Difference]: Finished difference Result 4562 states and 6487 transitions. [2020-10-26 20:49:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:01,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-10-26 20:49:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:01,933 INFO L225 Difference]: With dead ends: 4562 [2020-10-26 20:49:01,933 INFO L226 Difference]: Without dead ends: 2760 [2020-10-26 20:49:01,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2020-10-26 20:49:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2719. [2020-10-26 20:49:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2719 states. [2020-10-26 20:49:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 3818 transitions. [2020-10-26 20:49:02,035 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 3818 transitions. Word has length 219 [2020-10-26 20:49:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:02,035 INFO L481 AbstractCegarLoop]: Abstraction has 2719 states and 3818 transitions. [2020-10-26 20:49:02,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 3818 transitions. [2020-10-26 20:49:02,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-26 20:49:02,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:02,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:02,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:49:02,046 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:02,046 INFO L82 PathProgramCache]: Analyzing trace with hash -876654496, now seen corresponding path program 1 times [2020-10-26 20:49:02,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:02,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572479804] [2020-10-26 20:49:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:02,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:03,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:04,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 20:49:04,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:04,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2240 [2020-10-26 20:49:04,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:49:04,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:04,614 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:04,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:04,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:04,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:49:04,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:04,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:04,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:04,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:04,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:04,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:04,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:49:04,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:04,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:49:04,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:49:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:49:04,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572479804] [2020-10-26 20:49:04,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:49:04,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:49:04,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994596444] [2020-10-26 20:49:04,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:04,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:04,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:04,935 INFO L87 Difference]: Start difference. First operand 2719 states and 3818 transitions. Second operand 7 states. [2020-10-26 20:49:05,213 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:05,836 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:09,287 INFO L93 Difference]: Finished difference Result 8388 states and 14091 transitions. [2020-10-26 20:49:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:49:09,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2020-10-26 20:49:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:09,336 INFO L225 Difference]: With dead ends: 8388 [2020-10-26 20:49:09,336 INFO L226 Difference]: Without dead ends: 5675 [2020-10-26 20:49:09,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5675 states. [2020-10-26 20:49:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5675 to 5373. [2020-10-26 20:49:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5373 states. [2020-10-26 20:49:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 6978 transitions. [2020-10-26 20:49:09,672 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 6978 transitions. Word has length 220 [2020-10-26 20:49:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:09,672 INFO L481 AbstractCegarLoop]: Abstraction has 5373 states and 6978 transitions. [2020-10-26 20:49:09,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 6978 transitions. [2020-10-26 20:49:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-26 20:49:09,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:09,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:09,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:49:09,692 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:09,693 INFO L82 PathProgramCache]: Analyzing trace with hash 51476605, now seen corresponding path program 1 times [2020-10-26 20:49:09,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:09,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796802083] [2020-10-26 20:49:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:10,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:11,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:12,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-26 20:49:12,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:12,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2937 [2020-10-26 20:49:12,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:12,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:49:12,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:12,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-26 20:49:12,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:13,172 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:13,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:13,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:13,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:13,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:13,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:13,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:49:13,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:13,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:13,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:13,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:13,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:49:13,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:13,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 20:49:13,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:13,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:49:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:49:13,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:49:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796802083] [2020-10-26 20:49:13,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:13,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:13,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645776216] [2020-10-26 20:49:13,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:13,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:13,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:13,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:13,923 INFO L87 Difference]: Start difference. First operand 5373 states and 6978 transitions. Second operand 8 states. [2020-10-26 20:49:14,224 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:14,955 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:49:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:19,458 INFO L93 Difference]: Finished difference Result 12916 states and 17057 transitions. [2020-10-26 20:49:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:49:19,458 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 231 [2020-10-26 20:49:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:19,505 INFO L225 Difference]: With dead ends: 12916 [2020-10-26 20:49:19,505 INFO L226 Difference]: Without dead ends: 7183 [2020-10-26 20:49:19,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:49:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7183 states. [2020-10-26 20:49:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7183 to 7142. [2020-10-26 20:49:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7142 states. [2020-10-26 20:49:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 9310 transitions. [2020-10-26 20:49:19,750 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 9310 transitions. Word has length 231 [2020-10-26 20:49:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:19,751 INFO L481 AbstractCegarLoop]: Abstraction has 7142 states and 9310 transitions. [2020-10-26 20:49:19,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 9310 transitions. [2020-10-26 20:49:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-26 20:49:19,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:19,775 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:19,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:49:19,776 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash 770048240, now seen corresponding path program 1 times [2020-10-26 20:49:19,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:19,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915945821] [2020-10-26 20:49:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:19,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:20,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:20,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:23,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:49:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:25,152 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:25,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:25,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:25,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:25,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:25,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:25,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:49:25,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:25,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:25,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:25,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:25,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:25,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:25,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:25,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:25,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:25,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:49:25,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:25,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:49:25,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:25,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:25,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:25,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:25,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:25,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:49:25,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:25,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 20:49:25,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:49:25,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:49:25,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915945821] [2020-10-26 20:49:25,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:25,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:49:25,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676011285] [2020-10-26 20:49:25,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:49:25,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:49:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:49:25,707 INFO L87 Difference]: Start difference. First operand 7142 states and 9310 transitions. Second operand 10 states. [2020-10-26 20:49:25,977 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:26,389 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:49:28,566 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 160 [2020-10-26 20:49:30,591 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:49:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:33,773 INFO L93 Difference]: Finished difference Result 23451 states and 35142 transitions. [2020-10-26 20:49:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 20:49:33,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 242 [2020-10-26 20:49:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:33,880 INFO L225 Difference]: With dead ends: 23451 [2020-10-26 20:49:33,880 INFO L226 Difference]: Without dead ends: 16315 [2020-10-26 20:49:33,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-10-26 20:49:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16315 states. [2020-10-26 20:49:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16315 to 15621. [2020-10-26 20:49:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15621 states. [2020-10-26 20:49:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15621 states to 15621 states and 20630 transitions. [2020-10-26 20:49:34,559 INFO L78 Accepts]: Start accepts. Automaton has 15621 states and 20630 transitions. Word has length 242 [2020-10-26 20:49:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:34,560 INFO L481 AbstractCegarLoop]: Abstraction has 15621 states and 20630 transitions. [2020-10-26 20:49:34,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:49:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 15621 states and 20630 transitions. [2020-10-26 20:49:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-26 20:49:34,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:34,604 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:34,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:49:34,604 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1005601737, now seen corresponding path program 1 times [2020-10-26 20:49:34,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:34,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578520308] [2020-10-26 20:49:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:34,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:37,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:37,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 20:49:37,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:37,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2498 [2020-10-26 20:49:37,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:37,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:37,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:37,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 20:49:37,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:37,461 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:37,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:37,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:37,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:37,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:37,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:37,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:49:37,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:37,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:37,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:37,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:37,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:37,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:37,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:37,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:49:37,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:37,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 20:49:37,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:37,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:37,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:37,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:49:37,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:49:37,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578520308] [2020-10-26 20:49:37,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:49:37,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:49:37,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661110006] [2020-10-26 20:49:37,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:37,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:37,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:37,923 INFO L87 Difference]: Start difference. First operand 15621 states and 20630 transitions. Second operand 7 states. [2020-10-26 20:49:38,192 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:40,296 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:42,149 INFO L93 Difference]: Finished difference Result 34951 states and 46734 transitions. [2020-10-26 20:49:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:42,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 260 [2020-10-26 20:49:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:42,239 INFO L225 Difference]: With dead ends: 34951 [2020-10-26 20:49:42,239 INFO L226 Difference]: Without dead ends: 19336 [2020-10-26 20:49:42,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19336 states. [2020-10-26 20:49:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19336 to 19101. [2020-10-26 20:49:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19101 states. [2020-10-26 20:49:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19101 states to 19101 states and 25244 transitions. [2020-10-26 20:49:42,903 INFO L78 Accepts]: Start accepts. Automaton has 19101 states and 25244 transitions. Word has length 260 [2020-10-26 20:49:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:42,906 INFO L481 AbstractCegarLoop]: Abstraction has 19101 states and 25244 transitions. [2020-10-26 20:49:42,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 19101 states and 25244 transitions. [2020-10-26 20:49:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-26 20:49:42,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:42,963 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:42,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:49:42,964 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1225152268, now seen corresponding path program 1 times [2020-10-26 20:49:42,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:42,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954868522] [2020-10-26 20:49:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:43,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:43,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:44,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:48,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:48,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-26 20:49:48,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:48,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 20:49:48,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:49:48,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:48,309 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:48,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:48,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:48,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:48,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:48,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:48,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:49:48,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:48,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:48,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:48,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:48,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:48,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:48,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:48,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:48,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:49:48,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:48,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:49:48,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:49:48,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:48,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 20:49:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:48,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:48,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:49:48,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:49:48,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:49:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:48,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:49:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:48,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 59 proven. 24 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-26 20:49:48,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954868522] [2020-10-26 20:49:48,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:48,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:48,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056872454] [2020-10-26 20:49:48,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:48,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:48,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:48,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:48,676 INFO L87 Difference]: Start difference. First operand 19101 states and 25244 transitions. Second operand 7 states. [2020-10-26 20:49:48,942 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:51,024 INFO L93 Difference]: Finished difference Result 35205 states and 46699 transitions. [2020-10-26 20:49:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:49:51,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 264 [2020-10-26 20:49:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:51,077 INFO L225 Difference]: With dead ends: 35205 [2020-10-26 20:49:51,077 INFO L226 Difference]: Without dead ends: 16530 [2020-10-26 20:49:51,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2020-10-26 20:49:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 16430. [2020-10-26 20:49:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16430 states. [2020-10-26 20:49:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16430 states to 16430 states and 21042 transitions. [2020-10-26 20:49:51,555 INFO L78 Accepts]: Start accepts. Automaton has 16430 states and 21042 transitions. Word has length 264 [2020-10-26 20:49:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:51,555 INFO L481 AbstractCegarLoop]: Abstraction has 16430 states and 21042 transitions. [2020-10-26 20:49:51,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 16430 states and 21042 transitions. [2020-10-26 20:49:51,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:49:51,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:51,582 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-10-26 20:49:51,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:49:51,583 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1106821627, now seen corresponding path program 1 times [2020-10-26 20:49:51,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:51,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672099475] [2020-10-26 20:49:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:51,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:51,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:56,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:56,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-26 20:49:56,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:56,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 20:49:56,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:49:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:56,948 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:56,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:56,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:56,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:56,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:56,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:56,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:49:56,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:56,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:57,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:57,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:57,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:57,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:57,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:57,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:49:57,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:57,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:57,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:57,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:57,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:57,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:57,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:57,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:49:57,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:57,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 20:49:57,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:57,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:57,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:49:57,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:57,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:49:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:57,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:57,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:57,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:49:57,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:57,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:49:57,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:57,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:57,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:49:57,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:57,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:57,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 20:49:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:57,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:57,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:57,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:49:57,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:57,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:49:57,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:57,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:57,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:49:57,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:57,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 20:49:57,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672099475] [2020-10-26 20:49:57,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:57,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:49:57,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250805334] [2020-10-26 20:49:57,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:57,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:57,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:57,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:57,659 INFO L87 Difference]: Start difference. First operand 16430 states and 21042 transitions. Second operand 8 states. [2020-10-26 20:49:57,915 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:49:58,757 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:50:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:01,631 INFO L93 Difference]: Finished difference Result 39751 states and 51614 transitions. [2020-10-26 20:50:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:50:01,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 272 [2020-10-26 20:50:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:01,714 INFO L225 Difference]: With dead ends: 39751 [2020-10-26 20:50:01,715 INFO L226 Difference]: Without dead ends: 23327 [2020-10-26 20:50:01,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:50:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23327 states. [2020-10-26 20:50:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23327 to 22971. [2020-10-26 20:50:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22971 states. [2020-10-26 20:50:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22971 states to 22971 states and 29324 transitions. [2020-10-26 20:50:02,513 INFO L78 Accepts]: Start accepts. Automaton has 22971 states and 29324 transitions. Word has length 272 [2020-10-26 20:50:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:02,513 INFO L481 AbstractCegarLoop]: Abstraction has 22971 states and 29324 transitions. [2020-10-26 20:50:02,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 22971 states and 29324 transitions. [2020-10-26 20:50:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-26 20:50:02,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:02,540 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:50:02,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:50:02,540 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2052707382, now seen corresponding path program 1 times [2020-10-26 20:50:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:02,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647004140] [2020-10-26 20:50:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:02,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:02,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:03,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:06,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:06,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-26 20:50:06,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:06,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4161 [2020-10-26 20:50:06,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:06,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:06,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:06,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:50:06,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:07,076 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:07,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:07,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:07,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:07,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:07,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:07,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:50:07,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:07,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:07,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:07,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:07,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:07,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:07,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:07,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:07,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:07,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:07,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:50:07,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:07,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:07,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:07,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:07,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:07,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:07,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:07,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:07,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:50:07,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:07,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-26 20:50:07,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:07,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:07,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:07,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:50:07,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 70 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:50:07,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647004140] [2020-10-26 20:50:07,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:07,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:07,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890738641] [2020-10-26 20:50:07,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:07,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:07,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:07,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:07,877 INFO L87 Difference]: Start difference. First operand 22971 states and 29324 transitions. Second operand 8 states. [2020-10-26 20:50:08,155 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:50:09,149 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:50:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:11,651 INFO L93 Difference]: Finished difference Result 46419 states and 59637 transitions. [2020-10-26 20:50:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:50:11,652 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 271 [2020-10-26 20:50:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:11,731 INFO L225 Difference]: With dead ends: 46419 [2020-10-26 20:50:11,731 INFO L226 Difference]: Without dead ends: 24079 [2020-10-26 20:50:11,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:50:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24079 states. [2020-10-26 20:50:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24079 to 23649. [2020-10-26 20:50:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23649 states. [2020-10-26 20:50:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23649 states to 23649 states and 30191 transitions. [2020-10-26 20:50:12,369 INFO L78 Accepts]: Start accepts. Automaton has 23649 states and 30191 transitions. Word has length 271 [2020-10-26 20:50:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:12,369 INFO L481 AbstractCegarLoop]: Abstraction has 23649 states and 30191 transitions. [2020-10-26 20:50:12,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 23649 states and 30191 transitions. [2020-10-26 20:50:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-26 20:50:12,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:12,396 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 20:50:12,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:50:12,396 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:12,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2047823124, now seen corresponding path program 1 times [2020-10-26 20:50:12,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:12,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740503911] [2020-10-26 20:50:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:12,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:13,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:14,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:15,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:17,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:17,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-26 20:50:17,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:50:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 20:50:17,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 20:50:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 274 [2020-10-26 20:50:17,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:17,925 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:17,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:17,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:17,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:17,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:17,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:50:17,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:17,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:17,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:17,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:17,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:18,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:18,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:18,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:18,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:18,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:50:18,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:18,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:18,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:18,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:18,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:18,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:18,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:18,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:50:18,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:18,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 20:50:18,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:18,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:18,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:18,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:50:18,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:18,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:50:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:18,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:18,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:50:18,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:18,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 20:50:18,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:50:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:50:18,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-26 20:50:19,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740503911] [2020-10-26 20:50:19,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:19,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:50:19,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079642531] [2020-10-26 20:50:19,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:50:19,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:19,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:50:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:50:19,010 INFO L87 Difference]: Start difference. First operand 23649 states and 30191 transitions. Second operand 9 states. [2020-10-26 20:50:19,329 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:20,262 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:50:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:24,251 INFO L93 Difference]: Finished difference Result 58150 states and 76583 transitions. [2020-10-26 20:50:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:50:24,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 280 [2020-10-26 20:50:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:24,396 INFO L225 Difference]: With dead ends: 58150 [2020-10-26 20:50:24,396 INFO L226 Difference]: Without dead ends: 35208 [2020-10-26 20:50:24,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:50:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35208 states. [2020-10-26 20:50:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35208 to 34751. [2020-10-26 20:50:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34751 states. [2020-10-26 20:50:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34751 states to 34751 states and 44435 transitions. [2020-10-26 20:50:25,453 INFO L78 Accepts]: Start accepts. Automaton has 34751 states and 44435 transitions. Word has length 280 [2020-10-26 20:50:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:25,453 INFO L481 AbstractCegarLoop]: Abstraction has 34751 states and 44435 transitions. [2020-10-26 20:50:25,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:50:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 34751 states and 44435 transitions. [2020-10-26 20:50:25,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-26 20:50:25,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:25,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:50:25,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:50:25,488 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:25,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1650395233, now seen corresponding path program 1 times [2020-10-26 20:50:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:25,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088472104] [2020-10-26 20:50:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:25,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:27,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:29,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:29,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-26 20:50:29,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:29,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3430 [2020-10-26 20:50:29,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:29,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:50:29,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:29,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-26 20:50:29,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:30,594 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-26 20:50:30,964 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2020-10-26 20:50:31,331 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2020-10-26 20:50:31,837 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 86 [2020-10-26 20:50:32,280 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 71 [2020-10-26 20:50:32,670 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 68 [2020-10-26 20:50:33,018 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 63 [2020-10-26 20:50:33,273 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 46 [2020-10-26 20:50:33,567 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:33,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:33,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:33,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:33,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:33,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:33,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:50:33,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:33,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:33,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:33,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:33,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:33,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:33,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:34,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:34,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:50:34,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:34,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-26 20:50:34,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:50:34,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:34,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:50:34,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:34,809 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-10-26 20:50:35,351 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 118 [2020-10-26 20:50:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:50:37,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088472104] [2020-10-26 20:50:37,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:37,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:50:37,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497520582] [2020-10-26 20:50:37,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:50:37,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:50:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:50:37,353 INFO L87 Difference]: Start difference. First operand 34751 states and 44435 transitions. Second operand 16 states. [2020-10-26 20:50:37,750 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:50:40,725 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 101 [2020-10-26 20:50:41,296 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 96 [2020-10-26 20:50:41,949 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 109 [2020-10-26 20:50:43,409 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 284 DAG size of output: 208 [2020-10-26 20:50:44,923 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 295 DAG size of output: 217 [2020-10-26 20:50:46,469 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 122 [2020-10-26 20:50:48,037 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 303 DAG size of output: 214 [2020-10-26 20:50:50,567 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 307 DAG size of output: 213 [2020-10-26 20:50:53,525 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 306 DAG size of output: 211 [2020-10-26 20:50:57,540 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 307 DAG size of output: 210 [2020-10-26 20:50:59,831 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 307 DAG size of output: 208 [2020-10-26 20:51:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:00,770 INFO L93 Difference]: Finished difference Result 70252 states and 90374 transitions. [2020-10-26 20:51:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 20:51:00,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 296 [2020-10-26 20:51:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:00,892 INFO L225 Difference]: With dead ends: 70252 [2020-10-26 20:51:00,892 INFO L226 Difference]: Without dead ends: 35923 [2020-10-26 20:51:00,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-10-26 20:51:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35923 states. [2020-10-26 20:51:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35923 to 35529. [2020-10-26 20:51:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35529 states. [2020-10-26 20:51:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35529 states to 35529 states and 45289 transitions. [2020-10-26 20:51:01,949 INFO L78 Accepts]: Start accepts. Automaton has 35529 states and 45289 transitions. Word has length 296 [2020-10-26 20:51:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:01,949 INFO L481 AbstractCegarLoop]: Abstraction has 35529 states and 45289 transitions. [2020-10-26 20:51:01,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:51:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 35529 states and 45289 transitions. [2020-10-26 20:51:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-26 20:51:01,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:01,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:01,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:51:01,989 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash 430549689, now seen corresponding path program 1 times [2020-10-26 20:51:01,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:01,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668148905] [2020-10-26 20:51:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:02,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:02,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:02,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-26 20:51:07,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:51:07,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:51:07,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:51:07,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:07,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:51:07,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:07,414 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:07,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:07,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:07,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:51:07,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:07,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:07,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:07,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:07,619 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:51:07,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:08,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:08,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:51:08,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:08,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-26 20:51:08,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:08,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:51:08,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:08,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 20:51:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:08,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:08,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:08,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:51:08,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:08,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:51:08,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:08,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:08,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:51:08,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:08,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:08,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 20:51:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:08,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:08,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:08,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:51:08,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:51:08,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:51:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 103 proven. 23 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 20:51:08,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668148905] [2020-10-26 20:51:08,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:08,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:51:08,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486733] [2020-10-26 20:51:08,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:51:08,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:51:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:51:08,567 INFO L87 Difference]: Start difference. First operand 35529 states and 45289 transitions. Second operand 7 states. [2020-10-26 20:51:08,887 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:51:11,165 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:51:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:13,513 INFO L93 Difference]: Finished difference Result 97948 states and 127749 transitions. [2020-10-26 20:51:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:51:13,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 308 [2020-10-26 20:51:13,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:13,723 INFO L225 Difference]: With dead ends: 97948 [2020-10-26 20:51:13,723 INFO L226 Difference]: Without dead ends: 64444 [2020-10-26 20:51:13,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:51:13,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64444 states. [2020-10-26 20:51:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64444 to 64014. [2020-10-26 20:51:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64014 states. [2020-10-26 20:51:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64014 states to 64014 states and 82668 transitions. [2020-10-26 20:51:16,023 INFO L78 Accepts]: Start accepts. Automaton has 64014 states and 82668 transitions. Word has length 308 [2020-10-26 20:51:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:16,024 INFO L481 AbstractCegarLoop]: Abstraction has 64014 states and 82668 transitions. [2020-10-26 20:51:16,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:51:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 64014 states and 82668 transitions. [2020-10-26 20:51:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-26 20:51:16,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:16,076 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:51:16,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:51:16,076 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1224401177, now seen corresponding path program 1 times [2020-10-26 20:51:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:16,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468269463] [2020-10-26 20:51:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:16,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:16,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:17,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:19,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:19,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-26 20:51:19,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:51:19,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3638 [2020-10-26 20:51:19,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:51:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-10-26 20:51:19,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:20,709 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:20,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:20,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:20,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:20,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:20,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:20,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:51:20,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:20,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:20,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:51:21,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-26 20:51:21,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:21,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:21,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:51:21,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:51:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 20:51:21,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 20:51:21,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:51:21,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:21,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 20:51:21,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 20:51:21,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468269463] [2020-10-26 20:51:21,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:21,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:51:21,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143786146] [2020-10-26 20:51:21,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:51:21,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:51:21,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:51:21,789 INFO L87 Difference]: Start difference. First operand 64014 states and 82668 transitions. Second operand 8 states. [2020-10-26 20:51:22,104 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:51:24,008 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 168 [2020-10-26 20:51:26,631 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 167 [2020-10-26 20:51:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:31,186 INFO L93 Difference]: Finished difference Result 175785 states and 240433 transitions. [2020-10-26 20:51:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 20:51:31,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 324 [2020-10-26 20:51:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:31,917 INFO L225 Difference]: With dead ends: 175785 [2020-10-26 20:51:31,918 INFO L226 Difference]: Without dead ends: 110194 [2020-10-26 20:51:32,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:51:32,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110194 states. [2020-10-26 20:51:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110194 to 109111. [2020-10-26 20:51:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109111 states. [2020-10-26 20:51:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109111 states to 109111 states and 142456 transitions. [2020-10-26 20:51:35,546 INFO L78 Accepts]: Start accepts. Automaton has 109111 states and 142456 transitions. Word has length 324 [2020-10-26 20:51:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:35,547 INFO L481 AbstractCegarLoop]: Abstraction has 109111 states and 142456 transitions. [2020-10-26 20:51:35,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:51:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 109111 states and 142456 transitions. [2020-10-26 20:51:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-26 20:51:35,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:35,649 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 20:51:35,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:51:35,649 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:35,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1675082281, now seen corresponding path program 1 times [2020-10-26 20:51:35,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:35,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313171578] [2020-10-26 20:51:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:35,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:36,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:36,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:36,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking...