/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:47:05,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:47:05,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:47:05,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:47:05,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:47:05,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:47:05,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:47:05,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:47:05,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:47:05,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:47:05,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:47:05,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:47:05,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:47:05,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:47:05,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:47:05,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:47:05,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:47:05,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:47:05,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:47:05,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:47:05,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:47:05,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:47:05,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:47:05,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:47:05,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:47:05,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:47:05,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:47:05,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:47:05,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:47:05,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:47:05,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:47:05,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:47:05,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:47:05,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:47:05,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:47:05,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:47:05,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:47:05,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:47:05,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:47:05,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:47:05,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:47:05,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:47:05,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:47:05,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:47:05,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:47:05,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:47:05,249 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:47:05,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:47:05,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:47:05,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:47:05,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:47:05,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:47:05,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:47:05,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:47:05,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:47:05,251 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:47:05,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:47:05,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:47:05,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:47:05,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:47:05,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:47:05,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:47:05,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:47:05,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:47:05,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:47:05,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:47:05,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:47:05,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:47:05,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:47:05,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:47:05,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:47:05,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:47:05,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:47:05,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:47:05,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:47:05,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:47:05,711 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:47:05,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2020-10-26 23:47:05,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2292e4eb1/b94122e948404909ba8f53028ac70ad0/FLAGdc8df6d84 [2020-10-26 23:47:06,810 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:47:06,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2020-10-26 23:47:06,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2292e4eb1/b94122e948404909ba8f53028ac70ad0/FLAGdc8df6d84 [2020-10-26 23:47:06,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2292e4eb1/b94122e948404909ba8f53028ac70ad0 [2020-10-26 23:47:06,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:47:06,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:47:06,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:47:06,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:47:06,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:47:06,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:47:06" (1/1) ... [2020-10-26 23:47:06,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b223a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:06, skipping insertion in model container [2020-10-26 23:47:06,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:47:06" (1/1) ... [2020-10-26 23:47:06,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:47:07,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:47:07,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:47:07,970 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:47:08,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:47:08,333 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:47:08,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08 WrapperNode [2020-10-26 23:47:08,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:47:08,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:47:08,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:47:08,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:47:08,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (1/1) ... [2020-10-26 23:47:08,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (1/1) ... [2020-10-26 23:47:08,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (1/1) ... [2020-10-26 23:47:08,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (1/1) ... [2020-10-26 23:47:08,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (1/1) ... [2020-10-26 23:47:08,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (1/1) ... [2020-10-26 23:47:08,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (1/1) ... [2020-10-26 23:47:08,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:47:08,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:47:08,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:47:08,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:47:08,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:47:08,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:47:08,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:47:08,690 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:47:08,690 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:47:08,690 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:47:08,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:47:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:47:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:47:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:47:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:47:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:47:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:47:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:47:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:47:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:47:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:47:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:47:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:47:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:47:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:47:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:47:12,154 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:47:12,154 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:47:12,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:47:12 BoogieIcfgContainer [2020-10-26 23:47:12,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:47:12,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:47:12,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:47:12,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:47:12,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:47:06" (1/3) ... [2020-10-26 23:47:12,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4af9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:47:12, skipping insertion in model container [2020-10-26 23:47:12,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:47:08" (2/3) ... [2020-10-26 23:47:12,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4af9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:47:12, skipping insertion in model container [2020-10-26 23:47:12,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:47:12" (3/3) ... [2020-10-26 23:47:12,172 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label49.c [2020-10-26 23:47:12,186 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:47:12,192 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:47:12,208 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:47:12,251 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:47:12,251 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:47:12,251 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:47:12,251 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:47:12,251 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:47:12,252 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:47:12,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:47:12,252 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:47:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:47:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 23:47:12,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:12,292 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] [2020-10-26 23:47:12,292 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash -763449641, now seen corresponding path program 1 times [2020-10-26 23:47:12,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:12,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507304020] [2020-10-26 23:47:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:12,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:13,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:13,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 23:47:13,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-26 23:47:13,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:47:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:47:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 23:47:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:47:13,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:13,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:13,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:13,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:13,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 23:47:13,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:47:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:47:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507304020] [2020-10-26 23:47:13,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:47:13,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 23:47:13,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073116440] [2020-10-26 23:47:13,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:47:13,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:47:13,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:47:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:47:13,624 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 5 states. [2020-10-26 23:47:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:47:23,101 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-26 23:47:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:47:23,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-26 23:47:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:47:23,129 INFO L225 Difference]: With dead ends: 1208 [2020-10-26 23:47:23,129 INFO L226 Difference]: Without dead ends: 703 [2020-10-26 23:47:23,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:47:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-26 23:47:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-26 23:47:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-26 23:47:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-26 23:47:23,317 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 59 [2020-10-26 23:47:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:47:23,318 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-26 23:47:23,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:47:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-26 23:47:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 23:47:23,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:23,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:47:23,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:47:23,332 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1779298820, now seen corresponding path program 1 times [2020-10-26 23:47:23,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:23,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411870715] [2020-10-26 23:47:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:23,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:23,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:25,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:25,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:25,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 23:47:25,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:47:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1910 [2020-10-26 23:47:25,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:25,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:47:25,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:47:25,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 23:47:25,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:47:25,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:25,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:25,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:25,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:25,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:25,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:47:25,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:25,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:25,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:47:25,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:47:25,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:47:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:25,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:25,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 23:47:25,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:25,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-26 23:47:25,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:47:25,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:47:25,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411870715] [2020-10-26 23:47:25,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:47:25,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:47:25,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612117675] [2020-10-26 23:47:25,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:47:25,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:47:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:47:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:47:25,889 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 7 states. [2020-10-26 23:47:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:47:37,011 INFO L93 Difference]: Finished difference Result 2050 states and 3001 transitions. [2020-10-26 23:47:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:47:37,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2020-10-26 23:47:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:47:37,028 INFO L225 Difference]: With dead ends: 2050 [2020-10-26 23:47:37,028 INFO L226 Difference]: Without dead ends: 1359 [2020-10-26 23:47:37,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:47:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2020-10-26 23:47:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1325. [2020-10-26 23:47:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-10-26 23:47:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1715 transitions. [2020-10-26 23:47:37,113 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1715 transitions. Word has length 138 [2020-10-26 23:47:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:47:37,116 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 1715 transitions. [2020-10-26 23:47:37,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:47:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1715 transitions. [2020-10-26 23:47:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-26 23:47:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:37,133 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:47:37,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:47:37,133 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1647095198, now seen corresponding path program 1 times [2020-10-26 23:47:37,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:37,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395386553] [2020-10-26 23:47:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:37,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:37,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:37,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:41,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:41,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 23:47:41,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:47:41,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4047 [2020-10-26 23:47:41,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:47:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:47:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:47:41,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:41,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:41,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:41,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:41,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:41,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:41,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:47:41,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:47:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:41,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:47:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:41,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:41,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:41,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:47:41,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:41,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-26 23:47:41,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:41,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:47:41,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:47:42,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395386553] [2020-10-26 23:47:42,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:47:42,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:47:42,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489875318] [2020-10-26 23:47:42,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:47:42,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:47:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:47:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:47:42,601 INFO L87 Difference]: Start difference. First operand 1325 states and 1715 transitions. Second operand 7 states. [2020-10-26 23:47:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:47:50,563 INFO L93 Difference]: Finished difference Result 2976 states and 3777 transitions. [2020-10-26 23:47:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:47:50,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2020-10-26 23:47:50,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:47:50,576 INFO L225 Difference]: With dead ends: 2976 [2020-10-26 23:47:50,576 INFO L226 Difference]: Without dead ends: 1657 [2020-10-26 23:47:50,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:47:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2020-10-26 23:47:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1641. [2020-10-26 23:47:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1641 states. [2020-10-26 23:47:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2041 transitions. [2020-10-26 23:47:50,639 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2041 transitions. Word has length 259 [2020-10-26 23:47:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:47:50,640 INFO L481 AbstractCegarLoop]: Abstraction has 1641 states and 2041 transitions. [2020-10-26 23:47:50,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:47:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2041 transitions. [2020-10-26 23:47:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-26 23:47:50,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:50,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:47:50,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:47:50,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash 116230699, now seen corresponding path program 1 times [2020-10-26 23:47:50,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:50,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976898376] [2020-10-26 23:47:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:51,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:52,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:52,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-26 23:47:52,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:47:52,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2122 [2020-10-26 23:47:52,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:52,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:47:52,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:47:52,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 336 [2020-10-26 23:47:52,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:47:53,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:53,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:53,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:53,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:53,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:47:53,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:47:53,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:47:53,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:47:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:53,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:53,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:53,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:47:53,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:53,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-26 23:47:53,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-26 23:47:53,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:47:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976898376] [2020-10-26 23:47:55,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:47:55,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:47:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328022392] [2020-10-26 23:47:55,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:47:55,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:47:55,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:47:55,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:47:55,110 INFO L87 Difference]: Start difference. First operand 1641 states and 2041 transitions. Second operand 6 states. [2020-10-26 23:48:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:48:03,282 INFO L93 Difference]: Finished difference Result 1984 states and 2450 transitions. [2020-10-26 23:48:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 23:48:03,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 333 [2020-10-26 23:48:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:48:03,294 INFO L225 Difference]: With dead ends: 1984 [2020-10-26 23:48:03,294 INFO L226 Difference]: Without dead ends: 1981 [2020-10-26 23:48:03,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:48:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2020-10-26 23:48:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1952. [2020-10-26 23:48:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1952 states. [2020-10-26 23:48:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2413 transitions. [2020-10-26 23:48:03,368 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2413 transitions. Word has length 333 [2020-10-26 23:48:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:48:03,369 INFO L481 AbstractCegarLoop]: Abstraction has 1952 states and 2413 transitions. [2020-10-26 23:48:03,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:48:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2413 transitions. [2020-10-26 23:48:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-26 23:48:03,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:48:03,377 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:48:03,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:48:03,377 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:48:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:48:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash 942764622, now seen corresponding path program 1 times [2020-10-26 23:48:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:48:03,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782312866] [2020-10-26 23:48:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:48:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:03,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:03,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:03,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:05,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:05,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:08,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:08,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 368 [2020-10-26 23:48:08,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:48:08,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 23:48:08,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:08,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:48:08,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:48:08,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 359 [2020-10-26 23:48:08,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:08,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:48:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:08,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:08,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:08,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:48:08,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:48:08,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:48:08,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:48:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:48:08,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:48:08,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:08,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:48:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:08,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:08,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:08,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:08,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:48:08,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:48:08,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-26 23:48:08,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:48:08,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:48:08,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:48:08,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:09,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:48:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:09,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:09,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:10,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:10,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:48:10,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:48:10,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-26 23:48:10,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:48:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:48:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:48:10,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 47 proven. 146 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:48:11,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782312866] [2020-10-26 23:48:11,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:48:11,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:48:11,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664388277] [2020-10-26 23:48:11,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:48:11,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:48:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:48:11,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:48:11,304 INFO L87 Difference]: Start difference. First operand 1952 states and 2413 transitions. Second operand 12 states. [2020-10-26 23:48:11,613 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-10-26 23:48:13,108 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-26 23:48:13,535 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-26 23:48:13,769 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-26 23:48:14,111 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-26 23:48:15,400 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-26 23:48:15,842 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-26 23:48:16,075 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-26 23:48:16,466 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-26 23:48:17,707 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-26 23:48:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:48:30,394 INFO L93 Difference]: Finished difference Result 2804 states and 3643 transitions. [2020-10-26 23:48:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 23:48:30,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 354 [2020-10-26 23:48:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:48:30,416 INFO L225 Difference]: With dead ends: 2804 [2020-10-26 23:48:30,417 INFO L226 Difference]: Without dead ends: 2801 [2020-10-26 23:48:30,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 23:48:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2020-10-26 23:48:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2593. [2020-10-26 23:48:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2593 states. [2020-10-26 23:48:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 3363 transitions. [2020-10-26 23:48:30,535 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 3363 transitions. Word has length 354 [2020-10-26 23:48:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:48:30,536 INFO L481 AbstractCegarLoop]: Abstraction has 2593 states and 3363 transitions. [2020-10-26 23:48:30,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 23:48:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 3363 transitions. [2020-10-26 23:48:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-26 23:48:30,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:48:30,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:48:30,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:48:30,546 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:48:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:48:30,547 INFO L82 PathProgramCache]: Analyzing trace with hash 547498478, now seen corresponding path program 1 times [2020-10-26 23:48:30,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:48:30,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270802074] [2020-10-26 23:48:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:48:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:30,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:31,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:31,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:32,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:32,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 443 [2020-10-26 23:48:32,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:48:32,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2149 [2020-10-26 23:48:32,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:48:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:48:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:48:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:33,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:48:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:33,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:33,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:48:33,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:48:33,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 23:48:33,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:33,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:48:33,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:48:33,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:48:33,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:33,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:48:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:33,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:33,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:33,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:48:33,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:48:33,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-26 23:48:33,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:48:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:48:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:48:33,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:33,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:48:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:33,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:33,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 23:48:33,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:48:33,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-26 23:48:33,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:48:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:48:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 23:48:33,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:48:34,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270802074] [2020-10-26 23:48:34,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:48:34,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:48:34,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794624805] [2020-10-26 23:48:34,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:48:34,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:48:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:48:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:48:34,276 INFO L87 Difference]: Start difference. First operand 2593 states and 3363 transitions. Second operand 7 states. [2020-10-26 23:48:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:48:46,133 INFO L93 Difference]: Finished difference Result 6180 states and 8421 transitions. [2020-10-26 23:48:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:48:46,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 429 [2020-10-26 23:48:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:48:46,157 INFO L225 Difference]: With dead ends: 6180 [2020-10-26 23:48:46,157 INFO L226 Difference]: Without dead ends: 3900 [2020-10-26 23:48:46,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:48:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2020-10-26 23:48:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 3871. [2020-10-26 23:48:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3871 states. [2020-10-26 23:48:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 4854 transitions. [2020-10-26 23:48:46,294 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 4854 transitions. Word has length 429 [2020-10-26 23:48:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:48:46,295 INFO L481 AbstractCegarLoop]: Abstraction has 3871 states and 4854 transitions. [2020-10-26 23:48:46,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:48:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 4854 transitions. [2020-10-26 23:48:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-10-26 23:48:46,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:48:46,308 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:48:46,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:48:46,309 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:48:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:48:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2064789009, now seen corresponding path program 1 times [2020-10-26 23:48:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:48:46,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794113869] [2020-10-26 23:48:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:48:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:46,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:46,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:49,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:49,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:49,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:51,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:51,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 466 [2020-10-26 23:48:51,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:48:51,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 23:48:51,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:51,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:48:51,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:48:51,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 23:48:51,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:51,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:48:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:51,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:51,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:51,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:48:51,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:48:51,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:48:51,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:51,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:48:51,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:48:51,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:48:51,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:51,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:48:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:51,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:51,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:51,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:48:51,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:48:51,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 23:48:51,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:48:51,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:48:51,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:48:51,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:51,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:48:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:51,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:52,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:52,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:52,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:48:52,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:48:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-26 23:48:52,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:48:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:48:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:48:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:52,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-26 23:48:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:48:52,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:48:52,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:48:52,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 23:48:52,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:48:52,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 23:48:52,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:48:52,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:48:52,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-26 23:48:52,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:48:52,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 249 proven. 95 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-26 23:48:52,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794113869] [2020-10-26 23:48:52,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:48:52,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:48:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025192118] [2020-10-26 23:48:52,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:48:52,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:48:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:48:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:48:52,934 INFO L87 Difference]: Start difference. First operand 3871 states and 4854 transitions. Second operand 7 states. [2020-10-26 23:49:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:49:10,014 INFO L93 Difference]: Finished difference Result 6962 states and 8921 transitions. [2020-10-26 23:49:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:49:10,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 450 [2020-10-26 23:49:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:49:10,045 INFO L225 Difference]: With dead ends: 6962 [2020-10-26 23:49:10,045 INFO L226 Difference]: Without dead ends: 3942 [2020-10-26 23:49:10,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:49:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2020-10-26 23:49:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3876. [2020-10-26 23:49:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3876 states. [2020-10-26 23:49:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 4837 transitions. [2020-10-26 23:49:10,260 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 4837 transitions. Word has length 450 [2020-10-26 23:49:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:49:10,261 INFO L481 AbstractCegarLoop]: Abstraction has 3876 states and 4837 transitions. [2020-10-26 23:49:10,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:49:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 4837 transitions. [2020-10-26 23:49:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-10-26 23:49:10,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:49:10,269 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:49:10,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:49:10,270 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:49:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:49:10,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2127570207, now seen corresponding path program 1 times [2020-10-26 23:49:10,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:49:10,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815084651] [2020-10-26 23:49:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:49:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:10,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:10,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:10,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:12,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:15,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:15,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:15,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 551 [2020-10-26 23:49:15,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:49:15,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 23:49:15,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:15,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:49:15,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-26 23:49:15,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 23:49:15,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:49:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:15,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:15,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:49:15,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:15,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:49:15,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:15,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:49:15,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:49:15,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:49:15,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:15,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:49:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:15,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:15,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:15,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-26 23:49:15,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:15,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-26 23:49:15,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:15,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:49:15,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:49:15,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-26 23:49:15,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:15,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-10-26 23:49:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:16,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:16,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:16,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:16,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:49:16,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:49:16,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-26 23:49:16,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:49:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:49:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:49:16,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:16,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-10-26 23:49:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:16,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:16,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 23:49:16,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:16,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 23:49:16,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:49:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-26 23:49:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:49:16,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 334 proven. 95 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-26 23:49:16,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815084651] [2020-10-26 23:49:16,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:49:16,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:49:16,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185948054] [2020-10-26 23:49:16,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:49:16,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:49:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:49:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:49:16,875 INFO L87 Difference]: Start difference. First operand 3876 states and 4837 transitions. Second operand 7 states. [2020-10-26 23:49:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:49:30,102 INFO L93 Difference]: Finished difference Result 6960 states and 8874 transitions. [2020-10-26 23:49:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:49:30,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 535 [2020-10-26 23:49:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:49:30,126 INFO L225 Difference]: With dead ends: 6960 [2020-10-26 23:49:30,126 INFO L226 Difference]: Without dead ends: 3938 [2020-10-26 23:49:30,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:49:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-10-26 23:49:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3876. [2020-10-26 23:49:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3876 states. [2020-10-26 23:49:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 4806 transitions. [2020-10-26 23:49:30,277 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 4806 transitions. Word has length 535 [2020-10-26 23:49:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:49:30,278 INFO L481 AbstractCegarLoop]: Abstraction has 3876 states and 4806 transitions. [2020-10-26 23:49:30,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:49:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 4806 transitions. [2020-10-26 23:49:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2020-10-26 23:49:30,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:49:30,285 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:49:30,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:49:30,286 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:49:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:49:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash 970938912, now seen corresponding path program 1 times [2020-10-26 23:49:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:49:30,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436970640] [2020-10-26 23:49:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:49:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:30,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:30,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:35,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:35,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 553 [2020-10-26 23:49:35,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:49:35,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4577 [2020-10-26 23:49:35,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:35,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:49:35,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:49:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:49:35,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:35,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:49:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:35,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:35,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:35,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:49:35,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:35,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:49:35,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:35,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:49:35,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:49:35,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:49:35,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:35,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:49:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:35,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:35,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:35,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:49:35,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:35,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 23:49:35,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:49:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:49:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:49:35,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:35,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:49:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:35,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:35,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:35,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:49:35,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:35,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 23:49:35,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:49:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:49:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:49:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:35,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2020-10-26 23:49:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:35,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:35,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:49:35,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 23:49:35,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:49:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-26 23:49:35,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:49:35,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 265 proven. 92 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 23:49:36,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436970640] [2020-10-26 23:49:36,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:49:36,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:49:36,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216429993] [2020-10-26 23:49:36,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:49:36,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:49:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:49:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:49:36,295 INFO L87 Difference]: Start difference. First operand 3876 states and 4806 transitions. Second operand 7 states. [2020-10-26 23:49:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:49:51,153 INFO L93 Difference]: Finished difference Result 9097 states and 11255 transitions. [2020-10-26 23:49:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:49:51,155 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 537 [2020-10-26 23:49:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:49:51,186 INFO L225 Difference]: With dead ends: 9097 [2020-10-26 23:49:51,186 INFO L226 Difference]: Without dead ends: 5534 [2020-10-26 23:49:51,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:49:51,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2020-10-26 23:49:51,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 5143. [2020-10-26 23:49:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5143 states. [2020-10-26 23:49:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 6113 transitions. [2020-10-26 23:49:51,358 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 6113 transitions. Word has length 537 [2020-10-26 23:49:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:49:51,359 INFO L481 AbstractCegarLoop]: Abstraction has 5143 states and 6113 transitions. [2020-10-26 23:49:51,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:49:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 6113 transitions. [2020-10-26 23:49:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2020-10-26 23:49:51,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:49:51,370 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:49:51,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:49:51,370 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:49:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:49:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1261705704, now seen corresponding path program 1 times [2020-10-26 23:49:51,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:49:51,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682908219] [2020-10-26 23:49:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:49:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:51,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:52,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:52,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:52,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 565 [2020-10-26 23:49:52,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:49:52,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-26 23:49:52,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:49:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:49:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:49:52,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:52,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:49:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:52,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:52,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:52,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:49:52,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:52,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:49:52,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:52,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:49:52,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:49:52,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:49:52,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:53,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:49:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:53,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:53,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:53,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:49:53,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:53,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 23:49:53,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:49:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:49:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:49:53,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:53,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:49:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:53,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:53,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:53,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:49:53,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:53,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 23:49:53,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:53,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:49:53,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:49:53,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:49:53,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:53,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:49:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:53,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:53,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:53,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:49:53,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:53,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 23:49:53,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:53,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:49:53,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:49:53,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:49:53,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:49:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682908219] [2020-10-26 23:49:53,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:49:53,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:49:53,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307857807] [2020-10-26 23:49:53,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:49:53,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:49:53,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:49:53,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:49:53,747 INFO L87 Difference]: Start difference. First operand 5143 states and 6113 transitions. Second operand 7 states. [2020-10-26 23:49:56,483 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:50:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:08,600 INFO L93 Difference]: Finished difference Result 10017 states and 12002 transitions. [2020-10-26 23:50:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:50:08,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 549 [2020-10-26 23:50:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:08,625 INFO L225 Difference]: With dead ends: 10017 [2020-10-26 23:50:08,625 INFO L226 Difference]: Without dead ends: 5187 [2020-10-26 23:50:08,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:50:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2020-10-26 23:50:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 5137. [2020-10-26 23:50:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5137 states. [2020-10-26 23:50:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5137 states to 5137 states and 5870 transitions. [2020-10-26 23:50:08,796 INFO L78 Accepts]: Start accepts. Automaton has 5137 states and 5870 transitions. Word has length 549 [2020-10-26 23:50:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:08,797 INFO L481 AbstractCegarLoop]: Abstraction has 5137 states and 5870 transitions. [2020-10-26 23:50:08,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 5137 states and 5870 transitions. [2020-10-26 23:50:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-10-26 23:50:08,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:08,806 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:08,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:50:08,807 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:08,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:08,807 INFO L82 PathProgramCache]: Analyzing trace with hash 94819777, now seen corresponding path program 1 times [2020-10-26 23:50:08,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:08,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356421583] [2020-10-26 23:50:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:09,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:11,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:11,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 568 [2020-10-26 23:50:11,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:50:11,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2504 [2020-10-26 23:50:11,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:11,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:50:11,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:50:11,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-26 23:50:11,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:11,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:11,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:11,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:11,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:11,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:11,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:50:11,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:11,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:11,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:11,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:11,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:11,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:11,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:11,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:11,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:50:11,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:11,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 23:50:11,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:11,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:11,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:50:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:11,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:11,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:11,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:50:11,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:11,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 23:50:11,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:50:11,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:11,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:50:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:12,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:12,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:12,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 23:50:12,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:50:12,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 23:50:12,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:12,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:12,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:12,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 23:50:12,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 290 proven. 52 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-26 23:50:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356421583] [2020-10-26 23:50:12,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:50:12,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:50:12,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934438671] [2020-10-26 23:50:12,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:12,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:12,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:12,522 INFO L87 Difference]: Start difference. First operand 5137 states and 5870 transitions. Second operand 7 states. [2020-10-26 23:50:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:28,838 INFO L93 Difference]: Finished difference Result 8585 states and 10429 transitions. [2020-10-26 23:50:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:50:28,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 552 [2020-10-26 23:50:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:28,863 INFO L225 Difference]: With dead ends: 8585 [2020-10-26 23:50:28,863 INFO L226 Difference]: Without dead ends: 6563 [2020-10-26 23:50:28,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:50:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2020-10-26 23:50:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6197. [2020-10-26 23:50:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6197 states. [2020-10-26 23:50:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6197 states to 6197 states and 7238 transitions. [2020-10-26 23:50:29,018 INFO L78 Accepts]: Start accepts. Automaton has 6197 states and 7238 transitions. Word has length 552 [2020-10-26 23:50:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:29,019 INFO L481 AbstractCegarLoop]: Abstraction has 6197 states and 7238 transitions. [2020-10-26 23:50:29,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6197 states and 7238 transitions. [2020-10-26 23:50:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2020-10-26 23:50:29,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:29,028 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:29,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:50:29,029 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash 300773380, now seen corresponding path program 1 times [2020-10-26 23:50:29,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:29,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978470001] [2020-10-26 23:50:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:29,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:29,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:29,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:30,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:32,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:32,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 571 [2020-10-26 23:50:32,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:50:32,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3164 [2020-10-26 23:50:32,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:50:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 23:50:32,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:32,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:32,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:32,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:32,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:32,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:32,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:50:32,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:32,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:32,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:32,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:32,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:32,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:50:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:32,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:32,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:32,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:50:32,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:32,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 23:50:32,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:50:32,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:32,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:50:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:32,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:33,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:33,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:33,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:33,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 23:50:33,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:50:33,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-26 23:50:33,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 23:50:33,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 346 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:50:33,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978470001] [2020-10-26 23:50:33,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:50:33,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:50:33,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297530664] [2020-10-26 23:50:33,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:33,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:33,423 INFO L87 Difference]: Start difference. First operand 6197 states and 7238 transitions. Second operand 7 states. [2020-10-26 23:50:37,339 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:50:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:45,836 INFO L93 Difference]: Finished difference Result 13466 states and 16309 transitions. [2020-10-26 23:50:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:50:45,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 555 [2020-10-26 23:50:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:45,866 INFO L225 Difference]: With dead ends: 13466 [2020-10-26 23:50:45,866 INFO L226 Difference]: Without dead ends: 7893 [2020-10-26 23:50:45,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:50:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7893 states. [2020-10-26 23:50:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7893 to 7804. [2020-10-26 23:50:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-10-26 23:50:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 9134 transitions. [2020-10-26 23:50:46,075 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 9134 transitions. Word has length 555 [2020-10-26 23:50:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:46,076 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 9134 transitions. [2020-10-26 23:50:46,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 9134 transitions. [2020-10-26 23:50:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2020-10-26 23:50:46,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:46,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:46,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:50:46,087 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:46,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:46,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1086928367, now seen corresponding path program 1 times [2020-10-26 23:50:46,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:46,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892294779] [2020-10-26 23:50:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:46,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:47,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:48,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:49,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:49,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 573 [2020-10-26 23:50:49,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:50:49,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3302 [2020-10-26 23:50:49,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:49,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:49,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:50:49,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 23:50:49,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:49,762 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:50:49,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:49,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:49,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:49,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:49,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:49,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:50:49,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:49,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:49,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:49,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:49,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:49,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:49,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:49,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:49,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:50:49,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:49,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 23:50:49,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:49,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:49,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:49,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:49,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:50,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:50:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:50,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:50:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:50,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:50:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:50,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:50,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:50,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 23:50:50,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:50,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 23:50:50,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:50,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:50,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:50,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 23:50:50,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 354 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:50:50,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892294779] [2020-10-26 23:50:50,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:50:50,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:50:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284187925] [2020-10-26 23:50:50,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:50,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:50,581 INFO L87 Difference]: Start difference. First operand 7804 states and 9134 transitions. Second operand 7 states.