/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:29:19,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:29:19,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:29:19,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:29:19,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:29:19,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:29:19,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:29:19,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:29:19,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:29:19,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:29:19,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:29:19,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:29:19,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:29:19,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:29:19,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:29:19,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:29:19,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:29:19,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:29:19,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:29:19,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:29:19,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:29:19,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:29:19,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:29:19,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:29:19,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:29:19,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:29:19,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:29:19,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:29:19,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:29:19,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:29:19,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:29:19,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:29:19,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:29:19,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:29:19,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:29:19,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:29:19,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:29:19,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:29:19,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:29:19,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:29:19,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:29:19,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:29:19,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:29:19,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:29:19,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:29:19,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:29:19,308 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:29:19,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:29:19,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:29:19,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:29:19,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:29:19,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:29:19,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:29:19,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:29:19,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:29:19,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:29:19,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:29:19,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:29:19,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:29:19,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:29:19,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:29:19,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:29:19,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:29:19,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:29:19,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:29:19,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:29:19,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:29:19,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:29:19,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:29:19,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:29:19,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:29:19,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:29:19,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:29:19,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:29:19,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:29:19,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:29:19,860 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:29:19,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label39.c [2020-10-27 18:29:19,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a714032b3/035744c214b6469d8e439d8e6e3446f1/FLAG0875a7dfb [2020-10-27 18:29:21,035 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:29:21,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label39.c [2020-10-27 18:29:21,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a714032b3/035744c214b6469d8e439d8e6e3446f1/FLAG0875a7dfb [2020-10-27 18:29:21,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a714032b3/035744c214b6469d8e439d8e6e3446f1 [2020-10-27 18:29:21,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:29:21,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:29:21,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:29:21,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:29:21,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:29:21,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:29:21" (1/1) ... [2020-10-27 18:29:21,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6127e097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:21, skipping insertion in model container [2020-10-27 18:29:21,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:29:21" (1/1) ... [2020-10-27 18:29:21,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:29:21,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:29:22,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:29:22,233 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:29:22,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:29:22,778 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:29:22,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22 WrapperNode [2020-10-27 18:29:22,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:29:22,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:29:22,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:29:22,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:29:22,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (1/1) ... [2020-10-27 18:29:22,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (1/1) ... [2020-10-27 18:29:22,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (1/1) ... [2020-10-27 18:29:22,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (1/1) ... [2020-10-27 18:29:22,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (1/1) ... [2020-10-27 18:29:23,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (1/1) ... [2020-10-27 18:29:23,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (1/1) ... [2020-10-27 18:29:23,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:29:23,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:29:23,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:29:23,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:29:23,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:29:23,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:29:23,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:29:23,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:29:23,223 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:29:23,223 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:29:23,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:29:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:29:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:29:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:29:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:29:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:29:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:29:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:29:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:29:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:29:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:29:27,552 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:29:27,553 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:29:27,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:29:27 BoogieIcfgContainer [2020-10-27 18:29:27,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:29:27,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:29:27,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:29:27,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:29:27,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:29:21" (1/3) ... [2020-10-27 18:29:27,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19954b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:29:27, skipping insertion in model container [2020-10-27 18:29:27,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:29:22" (2/3) ... [2020-10-27 18:29:27,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19954b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:29:27, skipping insertion in model container [2020-10-27 18:29:27,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:29:27" (3/3) ... [2020-10-27 18:29:27,570 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label39.c [2020-10-27 18:29:27,583 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:29:27,590 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:29:27,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:29:27,650 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:29:27,650 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:29:27,651 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:29:27,651 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:29:27,651 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:29:27,651 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:29:27,651 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:29:27,651 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:29:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:29:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 18:29:27,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:29:27,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:29:27,702 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:29:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:29:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -23789063, now seen corresponding path program 1 times [2020-10-27 18:29:27,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:29:27,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543496500] [2020-10-27 18:29:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:29:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:27,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:28,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:28,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 18:29:28,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:28,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-27 18:29:28,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:29:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:29:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:29:28,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:29:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:29:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:28,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:28,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:28,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:29:28,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:28,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:29:28,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:29:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:29:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:29:28,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543496500] [2020-10-27 18:29:28,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:29:28,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:29:28,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649073419] [2020-10-27 18:29:28,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:29:28,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:29:28,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:29:28,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:29:28,552 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:29:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:29:37,853 INFO L93 Difference]: Finished difference Result 1229 states and 2206 transitions. [2020-10-27 18:29:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:29:37,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 18:29:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:29:37,879 INFO L225 Difference]: With dead ends: 1229 [2020-10-27 18:29:37,880 INFO L226 Difference]: Without dead ends: 709 [2020-10-27 18:29:37,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:29:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-27 18:29:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 695. [2020-10-27 18:29:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-27 18:29:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1081 transitions. [2020-10-27 18:29:38,046 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1081 transitions. Word has length 18 [2020-10-27 18:29:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:29:38,047 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1081 transitions. [2020-10-27 18:29:38,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:29:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1081 transitions. [2020-10-27 18:29:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 18:29:38,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:29:38,052 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:29:38,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:29:38,053 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:29:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:29:38,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1746276014, now seen corresponding path program 1 times [2020-10-27 18:29:38,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:29:38,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605289187] [2020-10-27 18:29:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:29:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:38,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:38,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:39,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:39,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:29:39,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:29:39,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-27 18:29:39,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:39,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:29:39,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 18:29:39,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 18:29:39,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:29:39,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:29:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:39,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:39,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:29:39,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:39,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:29:39,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:39,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:39,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:39,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:39,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:39,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:29:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:39,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:39,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:39,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:29:39,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:39,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 18:29:39,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:29:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 18:29:39,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:29:39,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605289187] [2020-10-27 18:29:39,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:29:39,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:29:39,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281220996] [2020-10-27 18:29:39,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:29:39,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:29:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:29:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:29:39,584 INFO L87 Difference]: Start difference. First operand 695 states and 1081 transitions. Second operand 5 states. [2020-10-27 18:29:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:29:50,610 INFO L93 Difference]: Finished difference Result 1397 states and 2301 transitions. [2020-10-27 18:29:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:29:50,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-27 18:29:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:29:50,619 INFO L225 Difference]: With dead ends: 1397 [2020-10-27 18:29:50,620 INFO L226 Difference]: Without dead ends: 1023 [2020-10-27 18:29:50,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:29:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2020-10-27 18:29:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1017. [2020-10-27 18:29:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2020-10-27 18:29:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1467 transitions. [2020-10-27 18:29:50,664 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1467 transitions. Word has length 88 [2020-10-27 18:29:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:29:50,665 INFO L481 AbstractCegarLoop]: Abstraction has 1017 states and 1467 transitions. [2020-10-27 18:29:50,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:29:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1467 transitions. [2020-10-27 18:29:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 18:29:50,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:29:50,669 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:29:50,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:29:50,669 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:29:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:29:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash 996797166, now seen corresponding path program 1 times [2020-10-27 18:29:50,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:29:50,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518683322] [2020-10-27 18:29:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:29:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:50,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:51,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:51,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:51,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 18:29:51,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:29:51,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1264 [2020-10-27 18:29:51,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:29:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 18:29:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 18:29:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:52,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:29:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:52,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:52,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:52,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:29:52,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:52,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:29:52,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:52,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:52,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:29:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:52,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:52,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:52,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:29:52,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:52,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 18:29:52,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:29:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:52,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 18:29:52,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:29:52,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518683322] [2020-10-27 18:29:52,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:29:52,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:29:52,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327610331] [2020-10-27 18:29:52,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:29:52,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:29:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:29:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:29:52,320 INFO L87 Difference]: Start difference. First operand 1017 states and 1467 transitions. Second operand 5 states. [2020-10-27 18:30:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:30:05,384 INFO L93 Difference]: Finished difference Result 2362 states and 3468 transitions. [2020-10-27 18:30:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:30:05,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-10-27 18:30:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:30:05,397 INFO L225 Difference]: With dead ends: 2362 [2020-10-27 18:30:05,397 INFO L226 Difference]: Without dead ends: 1666 [2020-10-27 18:30:05,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:30:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2020-10-27 18:30:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1652. [2020-10-27 18:30:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1652 states. [2020-10-27 18:30:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2270 transitions. [2020-10-27 18:30:05,460 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2270 transitions. Word has length 90 [2020-10-27 18:30:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:30:05,461 INFO L481 AbstractCegarLoop]: Abstraction has 1652 states and 2270 transitions. [2020-10-27 18:30:05,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:30:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2270 transitions. [2020-10-27 18:30:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 18:30:05,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:30:05,464 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:30:05,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:30:05,464 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:30:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:30:05,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1867527030, now seen corresponding path program 1 times [2020-10-27 18:30:05,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:30:05,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597123867] [2020-10-27 18:30:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:30:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:05,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:05,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:06,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:06,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 18:30:06,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:30:06,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-27 18:30:06,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:06,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:30:06,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:30:06,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 18:30:06,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:06,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:30:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:06,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:06,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:06,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:30:06,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:30:06,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:30:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:30:06,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:06,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:30:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:06,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:06,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:06,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:30:06,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:06,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 18:30:06,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:06,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:30:06,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:06,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:30:06,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:30:06,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597123867] [2020-10-27 18:30:06,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:30:06,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:30:06,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328062412] [2020-10-27 18:30:06,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:30:06,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:30:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:30:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:30:06,554 INFO L87 Difference]: Start difference. First operand 1652 states and 2270 transitions. Second operand 5 states. [2020-10-27 18:30:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:30:19,797 INFO L93 Difference]: Finished difference Result 4243 states and 6003 transitions. [2020-10-27 18:30:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:30:19,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-10-27 18:30:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:30:19,813 INFO L225 Difference]: With dead ends: 4243 [2020-10-27 18:30:19,813 INFO L226 Difference]: Without dead ends: 2597 [2020-10-27 18:30:19,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:30:19,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2020-10-27 18:30:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2595. [2020-10-27 18:30:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2595 states. [2020-10-27 18:30:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 3354 transitions. [2020-10-27 18:30:19,902 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 3354 transitions. Word has length 92 [2020-10-27 18:30:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:30:19,903 INFO L481 AbstractCegarLoop]: Abstraction has 2595 states and 3354 transitions. [2020-10-27 18:30:19,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:30:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 3354 transitions. [2020-10-27 18:30:19,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 18:30:19,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:30:19,905 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:30:19,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:30:19,906 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:30:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:30:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1508319003, now seen corresponding path program 1 times [2020-10-27 18:30:19,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:30:19,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95055200] [2020-10-27 18:30:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:30:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:19,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:20,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:20,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:21,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:21,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 18:30:21,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:30:21,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1095 [2020-10-27 18:30:21,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:30:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 18:30:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 18:30:21,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:21,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:30:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:21,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:21,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:21,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:30:21,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:21,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:30:21,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:30:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:30:21,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:21,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:30:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:21,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:21,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:21,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:30:21,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:21,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 18:30:21,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:30:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:30:21,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:30:21,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95055200] [2020-10-27 18:30:21,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:30:21,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:30:21,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844791520] [2020-10-27 18:30:21,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:30:21,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:30:21,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:30:21,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:30:21,348 INFO L87 Difference]: Start difference. First operand 2595 states and 3354 transitions. Second operand 5 states. [2020-10-27 18:30:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:30:31,521 INFO L93 Difference]: Finished difference Result 5184 states and 6929 transitions. [2020-10-27 18:30:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:30:31,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-27 18:30:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:30:31,542 INFO L225 Difference]: With dead ends: 5184 [2020-10-27 18:30:31,542 INFO L226 Difference]: Without dead ends: 3220 [2020-10-27 18:30:31,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:30:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2020-10-27 18:30:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3218. [2020-10-27 18:30:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3218 states. [2020-10-27 18:30:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 4075 transitions. [2020-10-27 18:30:31,666 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 4075 transitions. Word has length 93 [2020-10-27 18:30:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:30:31,667 INFO L481 AbstractCegarLoop]: Abstraction has 3218 states and 4075 transitions. [2020-10-27 18:30:31,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:30:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 4075 transitions. [2020-10-27 18:30:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 18:30:31,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:30:31,669 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:30:31,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:30:31,670 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:30:31,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:30:31,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1844552732, now seen corresponding path program 1 times [2020-10-27 18:30:31,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:30:31,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545325814] [2020-10-27 18:30:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:30:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:31,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:31,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:32,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:32,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:33,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:33,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 18:30:33,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:30:33,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1396 [2020-10-27 18:30:33,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:33,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:30:33,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-10-27 18:30:33,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:30:33,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:33,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:30:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:33,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:33,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:33,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:30:33,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:33,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:30:33,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:30:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:30:33,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:33,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:30:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:33,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:33,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:33,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:33,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:30:33,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:30:33,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 18:30:33,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:33,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:30:33,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-27 18:30:33,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:30:33,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:30:33,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545325814] [2020-10-27 18:30:33,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:30:33,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:30:33,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590182457] [2020-10-27 18:30:33,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:30:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:30:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:30:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:30:33,594 INFO L87 Difference]: Start difference. First operand 3218 states and 4075 transitions. Second operand 6 states. [2020-10-27 18:30:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:30:49,672 INFO L93 Difference]: Finished difference Result 10763 states and 13824 transitions. [2020-10-27 18:30:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:30:49,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-27 18:30:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:30:49,713 INFO L225 Difference]: With dead ends: 10763 [2020-10-27 18:30:49,713 INFO L226 Difference]: Without dead ends: 8176 [2020-10-27 18:30:49,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:30:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2020-10-27 18:30:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 8176. [2020-10-27 18:30:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8176 states. [2020-10-27 18:30:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 9509 transitions. [2020-10-27 18:30:49,960 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 9509 transitions. Word has length 117 [2020-10-27 18:30:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:30:49,960 INFO L481 AbstractCegarLoop]: Abstraction has 8176 states and 9509 transitions. [2020-10-27 18:30:49,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:30:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 9509 transitions. [2020-10-27 18:30:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 18:30:49,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:30:49,963 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:30:49,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:30:49,963 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:30:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:30:49,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1116887723, now seen corresponding path program 1 times [2020-10-27 18:30:49,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:30:49,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437954536] [2020-10-27 18:30:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:30:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:50,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:50,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:50,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 18:30:50,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:50,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 18:30:50,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:50,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:30:50,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:30:50,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 18:30:50,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:50,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:30:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:50,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:50,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:30:50,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:50,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 18:30:50,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:30:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:30:50,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:50,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:30:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:50,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:50,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:50,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 18:30:50,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:50,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 18:30:50,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:50,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:30:50,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:30:50,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 18:30:50,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:30:50,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437954536] [2020-10-27 18:30:50,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:30:50,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 18:30:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140397016] [2020-10-27 18:30:50,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:30:50,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:30:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:30:50,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:30:50,896 INFO L87 Difference]: Start difference. First operand 8176 states and 9509 transitions. Second operand 7 states. [2020-10-27 18:31:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:31:01,254 INFO L93 Difference]: Finished difference Result 18325 states and 21962 transitions. [2020-10-27 18:31:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:31:01,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-27 18:31:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:31:01,308 INFO L225 Difference]: With dead ends: 18325 [2020-10-27 18:31:01,309 INFO L226 Difference]: Without dead ends: 10155 [2020-10-27 18:31:01,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:31:01,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10155 states. [2020-10-27 18:31:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10155 to 10126. [2020-10-27 18:31:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10126 states. [2020-10-27 18:31:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10126 states to 10126 states and 11654 transitions. [2020-10-27 18:31:01,606 INFO L78 Accepts]: Start accepts. Automaton has 10126 states and 11654 transitions. Word has length 121 [2020-10-27 18:31:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:31:01,607 INFO L481 AbstractCegarLoop]: Abstraction has 10126 states and 11654 transitions. [2020-10-27 18:31:01,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:31:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 10126 states and 11654 transitions. [2020-10-27 18:31:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 18:31:01,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:31:01,610 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:31:01,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:31:01,610 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:31:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:31:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash -783234861, now seen corresponding path program 1 times [2020-10-27 18:31:01,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:31:01,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645251525] [2020-10-27 18:31:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:31:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:01,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:02,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:02,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 18:31:02,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:31:02,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-27 18:31:02,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:02,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:31:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 18:31:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 18:31:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:31:02,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:31:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:02,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:02,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:02,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:31:02,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 18:31:02,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:31:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:31:02,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:31:02,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:31:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:02,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:03,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:03,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:31:03,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:03,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 18:31:03,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:03,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:31:03,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:03,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:31:03,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:31:03,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645251525] [2020-10-27 18:31:03,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:31:03,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:31:03,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366090652] [2020-10-27 18:31:03,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:31:03,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:31:03,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:31:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:31:03,178 INFO L87 Difference]: Start difference. First operand 10126 states and 11654 transitions. Second operand 5 states. [2020-10-27 18:31:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:31:13,768 INFO L93 Difference]: Finished difference Result 24627 states and 28706 transitions. [2020-10-27 18:31:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:31:13,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-10-27 18:31:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:31:13,845 INFO L225 Difference]: With dead ends: 24627 [2020-10-27 18:31:13,846 INFO L226 Difference]: Without dead ends: 14815 [2020-10-27 18:31:13,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:31:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14815 states. [2020-10-27 18:31:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14815 to 13870. [2020-10-27 18:31:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13870 states. [2020-10-27 18:31:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13870 states to 13870 states and 16172 transitions. [2020-10-27 18:31:14,234 INFO L78 Accepts]: Start accepts. Automaton has 13870 states and 16172 transitions. Word has length 147 [2020-10-27 18:31:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:31:14,235 INFO L481 AbstractCegarLoop]: Abstraction has 13870 states and 16172 transitions. [2020-10-27 18:31:14,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:31:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 13870 states and 16172 transitions. [2020-10-27 18:31:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 18:31:14,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:31:14,239 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:31:14,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:31:14,240 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:31:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:31:14,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1377548873, now seen corresponding path program 1 times [2020-10-27 18:31:14,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:31:14,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941438235] [2020-10-27 18:31:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:31:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:14,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:14,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:15,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:15,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 18:31:15,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:31:15,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1527 [2020-10-27 18:31:15,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:15,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:31:15,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 18:31:15,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 18:31:15,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:15,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:31:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:15,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:16,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:31:16,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:31:16,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:31:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:16,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:31:16,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:16,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:31:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:16,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:16,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:16,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:31:16,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 18:31:16,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:31:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 18:31:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:31:16,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941438235] [2020-10-27 18:31:16,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:31:16,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:31:16,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529440275] [2020-10-27 18:31:16,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:31:16,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:31:16,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:31:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:31:16,429 INFO L87 Difference]: Start difference. First operand 13870 states and 16172 transitions. Second operand 5 states. [2020-10-27 18:31:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:31:28,464 INFO L93 Difference]: Finished difference Result 34940 states and 41490 transitions. [2020-10-27 18:31:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:31:28,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-27 18:31:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:31:28,543 INFO L225 Difference]: With dead ends: 34940 [2020-10-27 18:31:28,543 INFO L226 Difference]: Without dead ends: 21384 [2020-10-27 18:31:28,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:31:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21384 states. [2020-10-27 18:31:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21384 to 20429. [2020-10-27 18:31:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20429 states. [2020-10-27 18:31:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20429 states to 20429 states and 24345 transitions. [2020-10-27 18:31:29,126 INFO L78 Accepts]: Start accepts. Automaton has 20429 states and 24345 transitions. Word has length 161 [2020-10-27 18:31:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:31:29,127 INFO L481 AbstractCegarLoop]: Abstraction has 20429 states and 24345 transitions. [2020-10-27 18:31:29,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:31:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 20429 states and 24345 transitions. [2020-10-27 18:31:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-27 18:31:29,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:31:29,133 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:31:29,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:31:29,133 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:31:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:31:29,134 INFO L82 PathProgramCache]: Analyzing trace with hash 471880040, now seen corresponding path program 1 times [2020-10-27 18:31:29,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:31:29,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390463282] [2020-10-27 18:31:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:31:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:29,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:29,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:30,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:31,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:31,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:33,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:34,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:34,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 18:31:34,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:31:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 18:31:34,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:31:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-10-27 18:31:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 18:31:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:34,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:31:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:34,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:34,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:34,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:31:34,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:34,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:31:34,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:31:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:34,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:31:34,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:34,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:31:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:34,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:34,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:34,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:31:34,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:34,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 18:31:34,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:31:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:31:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:34,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 18:31:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:34,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:34,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:34,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 18:31:34,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:34,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-27 18:31:34,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:31:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 18:31:34,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 18:31:34,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390463282] [2020-10-27 18:31:34,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:31:34,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:31:34,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969726932] [2020-10-27 18:31:34,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:31:34,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:31:34,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:31:34,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:31:34,748 INFO L87 Difference]: Start difference. First operand 20429 states and 24345 transitions. Second operand 5 states. [2020-10-27 18:31:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:31:50,268 INFO L93 Difference]: Finished difference Result 51397 states and 62482 transitions. [2020-10-27 18:31:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:31:50,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2020-10-27 18:31:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:31:50,376 INFO L225 Difference]: With dead ends: 51397 [2020-10-27 18:31:50,377 INFO L226 Difference]: Without dead ends: 31282 [2020-10-27 18:31:50,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:31:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31282 states. [2020-10-27 18:31:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31282 to 25126. [2020-10-27 18:31:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25126 states. [2020-10-27 18:31:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25126 states to 25126 states and 30841 transitions. [2020-10-27 18:31:51,181 INFO L78 Accepts]: Start accepts. Automaton has 25126 states and 30841 transitions. Word has length 204 [2020-10-27 18:31:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:31:51,182 INFO L481 AbstractCegarLoop]: Abstraction has 25126 states and 30841 transitions. [2020-10-27 18:31:51,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:31:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 25126 states and 30841 transitions. [2020-10-27 18:31:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 18:31:51,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:31:51,189 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:31:51,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:31:51,190 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:31:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:31:51,190 INFO L82 PathProgramCache]: Analyzing trace with hash -799914161, now seen corresponding path program 1 times [2020-10-27 18:31:51,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:31:51,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021711497] [2020-10-27 18:31:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:31:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:51,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:51,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:52,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:53,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:53,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 18:31:53,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:31:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2540 [2020-10-27 18:31:53,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:31:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 210 [2020-10-27 18:31:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 18:31:53,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:53,988 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 18:31:53,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:31:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:53,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:53,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:53,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:31:53,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:31:53,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:31:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:31:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:54,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:31:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:31:54,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:31:54,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:31:54,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:31:54,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:31:54,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 18:31:54,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:31:54,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:31:54,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:31:54,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 195 [2020-10-27 18:31:54,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:31:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:31:54,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021711497] [2020-10-27 18:31:54,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:31:54,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:31:54,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232436319] [2020-10-27 18:31:54,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:31:54,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:31:54,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:31:54,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:31:54,476 INFO L87 Difference]: Start difference. First operand 25126 states and 30841 transitions. Second operand 5 states. [2020-10-27 18:31:54,614 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:32:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:32:05,871 INFO L93 Difference]: Finished difference Result 53038 states and 66119 transitions. [2020-10-27 18:32:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:32:05,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2020-10-27 18:32:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:32:06,001 INFO L225 Difference]: With dead ends: 53038 [2020-10-27 18:32:06,001 INFO L226 Difference]: Without dead ends: 28225 [2020-10-27 18:32:06,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:32:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28225 states. [2020-10-27 18:32:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28225 to 27609. [2020-10-27 18:32:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27609 states. [2020-10-27 18:32:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27609 states to 27609 states and 33748 transitions. [2020-10-27 18:32:07,113 INFO L78 Accepts]: Start accepts. Automaton has 27609 states and 33748 transitions. Word has length 218 [2020-10-27 18:32:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:32:07,114 INFO L481 AbstractCegarLoop]: Abstraction has 27609 states and 33748 transitions. [2020-10-27 18:32:07,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:32:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 27609 states and 33748 transitions. [2020-10-27 18:32:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-27 18:32:07,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:32:07,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:32:07,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:32:07,122 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:32:07,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:32:07,123 INFO L82 PathProgramCache]: Analyzing trace with hash -158387553, now seen corresponding path program 1 times [2020-10-27 18:32:07,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:32:07,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482457092] [2020-10-27 18:32:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:32:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:08,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:08,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-27 18:32:08,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:08,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1285 [2020-10-27 18:32:08,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:08,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 18:32:08,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:32:08,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 18:32:08,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:08,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:32:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:08,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:08,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:08,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:32:08,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:08,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 18:32:08,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:08,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:32:08,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:32:08,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:32:08,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:08,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:32:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:09,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:09,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 18:32:09,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:09,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-27 18:32:09,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:32:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:32:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-27 18:32:09,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:32:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482457092] [2020-10-27 18:32:10,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:32:10,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:32:10,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870341757] [2020-10-27 18:32:10,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:32:10,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:32:10,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:32:10,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:32:10,092 INFO L87 Difference]: Start difference. First operand 27609 states and 33748 transitions. Second operand 8 states. [2020-10-27 18:32:10,288 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:32:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:32:26,031 INFO L93 Difference]: Finished difference Result 65297 states and 79118 transitions. [2020-10-27 18:32:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:32:26,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 255 [2020-10-27 18:32:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:32:26,196 INFO L225 Difference]: With dead ends: 65297 [2020-10-27 18:32:26,196 INFO L226 Difference]: Without dead ends: 37694 [2020-10-27 18:32:26,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:32:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37694 states. [2020-10-27 18:32:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37694 to 32685. [2020-10-27 18:32:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32685 states. [2020-10-27 18:32:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32685 states to 32685 states and 39655 transitions. [2020-10-27 18:32:27,679 INFO L78 Accepts]: Start accepts. Automaton has 32685 states and 39655 transitions. Word has length 255 [2020-10-27 18:32:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:32:27,680 INFO L481 AbstractCegarLoop]: Abstraction has 32685 states and 39655 transitions. [2020-10-27 18:32:27,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:32:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32685 states and 39655 transitions. [2020-10-27 18:32:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 18:32:27,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:32:27,690 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:32:27,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:32:27,691 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:32:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:32:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash -314410658, now seen corresponding path program 1 times [2020-10-27 18:32:27,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:32:27,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092623407] [2020-10-27 18:32:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:32:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:27,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:28,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:31,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:31,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-27 18:32:31,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:32:31,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4212 [2020-10-27 18:32:31,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:31,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:32:31,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 210 [2020-10-27 18:32:31,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:32:31,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:32,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:32:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:32,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:32,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:32,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:32:32,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:32,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:32:32,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:32,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:32:32,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:32:32,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:32:32,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:32,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:32:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:32,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:32,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:32,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:32:32,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:32,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-27 18:32:32,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:32,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:32:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:32:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 195 [2020-10-27 18:32:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:32,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:32:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:32,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:32,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 18:32:32,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:32,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 18:32:32,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:32,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:32:32,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:32:32,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:32:32,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:32:33,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092623407] [2020-10-27 18:32:33,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:32:33,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:32:33,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995603112] [2020-10-27 18:32:33,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:32:33,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:32:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:32:33,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:32:33,031 INFO L87 Difference]: Start difference. First operand 32685 states and 39655 transitions. Second operand 7 states. [2020-10-27 18:32:33,169 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 18:32:38,655 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 18:32:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:32:47,298 INFO L93 Difference]: Finished difference Result 75675 states and 93018 transitions. [2020-10-27 18:32:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:32:47,302 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 309 [2020-10-27 18:32:47,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:32:47,478 INFO L225 Difference]: With dead ends: 75675 [2020-10-27 18:32:47,479 INFO L226 Difference]: Without dead ends: 43303 [2020-10-27 18:32:47,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:32:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43303 states. [2020-10-27 18:32:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43303 to 41106. [2020-10-27 18:32:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41106 states. [2020-10-27 18:32:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41106 states to 41106 states and 50657 transitions. [2020-10-27 18:32:49,107 INFO L78 Accepts]: Start accepts. Automaton has 41106 states and 50657 transitions. Word has length 309 [2020-10-27 18:32:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:32:49,108 INFO L481 AbstractCegarLoop]: Abstraction has 41106 states and 50657 transitions. [2020-10-27 18:32:49,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:32:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 41106 states and 50657 transitions. [2020-10-27 18:32:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-27 18:32:49,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:32:49,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:32:49,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:32:49,132 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:32:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:32:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash -714646721, now seen corresponding path program 1 times [2020-10-27 18:32:49,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:32:49,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928847510] [2020-10-27 18:32:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:32:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:49,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:49,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:51,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:51,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-27 18:32:51,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:32:51,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2563 [2020-10-27 18:32:51,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:51,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:32:51,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:32:51,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-27 18:32:51,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:52,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:32:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:52,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:52,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:52,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:32:52,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:52,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 18:32:52,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:52,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:32:52,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:32:52,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:32:52,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:52,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:32:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:52,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:52,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:52,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:32:52,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:52,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 18:32:52,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:52,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:32:52,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:32:52,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-27 18:32:52,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:52,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:32:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:52,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:52,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:52,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 18:32:52,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:52,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 18:32:52,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:52,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:32:52,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 18:32:52,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:32:52,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 18:32:53,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928847510] [2020-10-27 18:32:53,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:32:53,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:32:53,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55620490] [2020-10-27 18:32:53,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:32:53,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:32:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:32:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:32:53,051 INFO L87 Difference]: Start difference. First operand 41106 states and 50657 transitions. Second operand 7 states. [2020-10-27 18:32:53,206 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:32:55,442 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 71