/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:56:01,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:56:01,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:56:01,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:56:01,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:56:01,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:56:01,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:56:01,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:56:01,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:56:01,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:56:01,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:56:01,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:56:01,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:56:01,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:56:01,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:56:01,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:56:01,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:56:01,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:56:01,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:56:01,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:56:01,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:56:01,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:56:01,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:56:01,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:56:01,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:56:01,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:56:01,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:56:01,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:56:01,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:56:01,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:56:01,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:56:01,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:56:01,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:56:01,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:56:01,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:56:01,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:56:01,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:56:01,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:56:01,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:56:01,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:56:01,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:56:01,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 22:56:01,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:56:01,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:56:01,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:56:01,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:56:01,278 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:56:01,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:56:01,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:56:01,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:56:01,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:56:01,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:56:01,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:56:01,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:56:01,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:56:01,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:56:01,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:56:01,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:56:01,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:56:01,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:56:01,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:56:01,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:56:01,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:56:01,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:56:01,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:56:01,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:56:01,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:56:01,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:56:01,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:56:01,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:56:01,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:56:01,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:56:01,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:56:01,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:56:01,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:56:01,708 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:56:01,709 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:56:01,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2020-10-26 22:56:01,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8da4d31/cb2bc3a0840c47fdb285cabef82f1c02/FLAGcdf158489 [2020-10-26 22:56:02,763 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:56:02,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2020-10-26 22:56:02,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8da4d31/cb2bc3a0840c47fdb285cabef82f1c02/FLAGcdf158489 [2020-10-26 22:56:02,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8da4d31/cb2bc3a0840c47fdb285cabef82f1c02 [2020-10-26 22:56:02,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:56:02,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:56:02,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:56:02,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:56:02,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:56:02,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:56:02" (1/1) ... [2020-10-26 22:56:02,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3965b1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:02, skipping insertion in model container [2020-10-26 22:56:02,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:56:02" (1/1) ... [2020-10-26 22:56:02,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:56:03,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:56:04,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:56:04,533 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:56:05,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:56:05,301 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:56:05,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05 WrapperNode [2020-10-26 22:56:05,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:56:05,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:56:05,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:56:05,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:56:05,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (1/1) ... [2020-10-26 22:56:05,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (1/1) ... [2020-10-26 22:56:05,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (1/1) ... [2020-10-26 22:56:05,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (1/1) ... [2020-10-26 22:56:05,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (1/1) ... [2020-10-26 22:56:05,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (1/1) ... [2020-10-26 22:56:05,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (1/1) ... [2020-10-26 22:56:05,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:56:05,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:56:05,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:56:05,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:56:05,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:56:05,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:56:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:56:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:56:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:56:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:56:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:56:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:56:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:56:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:56:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:56:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:56:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:56:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:56:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:56:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:56:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:56:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:56:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:56:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:56:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:56:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:56:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:56:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:56:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:56:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:56:12,178 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:56:12,178 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:56:12,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:56:12 BoogieIcfgContainer [2020-10-26 22:56:12,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:56:12,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:56:12,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:56:12,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:56:12,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:56:02" (1/3) ... [2020-10-26 22:56:12,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:56:12, skipping insertion in model container [2020-10-26 22:56:12,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:05" (2/3) ... [2020-10-26 22:56:12,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:56:12, skipping insertion in model container [2020-10-26 22:56:12,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:56:12" (3/3) ... [2020-10-26 22:56:12,198 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label36.c [2020-10-26 22:56:12,213 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:56:12,221 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:56:12,237 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:56:12,297 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:56:12,297 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:56:12,297 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:56:12,297 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:56:12,297 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:56:12,297 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:56:12,298 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:56:12,298 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:56:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:56:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 22:56:12,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:12,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:56:12,367 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:12,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1943169372, now seen corresponding path program 1 times [2020-10-26 22:56:12,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:12,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350788027] [2020-10-26 22:56:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:12,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:13,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:13,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:56:13,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:13,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-26 22:56:13,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:13,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:13,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 22:56:13,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 22:56:13,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:13,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:13,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:13,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:13,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:13,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 22:56:13,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:13,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:13,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:13,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:13,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350788027] [2020-10-26 22:56:13,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:13,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:56:13,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748209087] [2020-10-26 22:56:13,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:56:13,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:56:13,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:56:13,670 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 22:56:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:25,253 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-26 22:56:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:56:25,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-26 22:56:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:25,288 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:56:25,288 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:56:25,299 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 [2020-10-26 22:56:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:56:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:56:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:56:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2522 transitions. [2020-10-26 22:56:25,499 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2522 transitions. Word has length 64 [2020-10-26 22:56:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:25,501 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2522 transitions. [2020-10-26 22:56:25,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:56:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2522 transitions. [2020-10-26 22:56:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 22:56:25,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:25,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:56:25,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:56:25,522 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:25,524 INFO L82 PathProgramCache]: Analyzing trace with hash -353982758, now seen corresponding path program 1 times [2020-10-26 22:56:25,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:25,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509596825] [2020-10-26 22:56:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:25,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:25,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:26,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:26,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 22:56:26,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:56:26,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-26 22:56:26,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:26,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:26,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:56:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 22:56:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:26,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:26,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:26,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:26,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:26,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:26,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:56:26,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:26,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:56:26,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:26,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:56:26,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:26,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:26,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:26,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:26,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:56:26,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:26,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-26 22:56:26,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:56:26,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:26,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509596825] [2020-10-26 22:56:26,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:56:26,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:56:26,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180190220] [2020-10-26 22:56:26,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:56:26,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:26,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:56:26,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:56:26,846 INFO L87 Difference]: Start difference. First operand 1554 states and 2522 transitions. Second operand 5 states. [2020-10-26 22:56:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:34,955 INFO L93 Difference]: Finished difference Result 3164 states and 5115 transitions. [2020-10-26 22:56:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:56:34,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-10-26 22:56:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:34,971 INFO L225 Difference]: With dead ends: 3164 [2020-10-26 22:56:34,972 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:56:34,978 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 [2020-10-26 22:56:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:56:35,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:56:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:56:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2334 transitions. [2020-10-26 22:56:35,054 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2334 transitions. Word has length 139 [2020-10-26 22:56:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:35,058 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2334 transitions. [2020-10-26 22:56:35,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:56:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2334 transitions. [2020-10-26 22:56:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-26 22:56:35,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:35,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:56:35,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:56:35,064 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:35,066 INFO L82 PathProgramCache]: Analyzing trace with hash 534907908, now seen corresponding path program 1 times [2020-10-26 22:56:35,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:35,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978512774] [2020-10-26 22:56:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:35,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:35,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:36,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:36,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 22:56:36,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:56:36,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1301 [2020-10-26 22:56:36,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:36,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:36,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:36,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 22:56:36,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:36,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:36,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:36,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:36,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:36,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:36,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 22:56:36,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:36,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:36,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:36,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:36,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:36,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 22:56:36,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 22:56:36,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:56:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:36,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978512774] [2020-10-26 22:56:36,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:36,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:56:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088729487] [2020-10-26 22:56:36,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:56:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:56:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:56:36,937 INFO L87 Difference]: Start difference. First operand 1554 states and 2334 transitions. Second operand 7 states. [2020-10-26 22:56:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:51,122 INFO L93 Difference]: Finished difference Result 4763 states and 7191 transitions. [2020-10-26 22:56:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:56:51,123 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-10-26 22:56:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:51,155 INFO L225 Difference]: With dead ends: 4763 [2020-10-26 22:56:51,155 INFO L226 Difference]: Without dead ends: 3215 [2020-10-26 22:56:51,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:56:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2020-10-26 22:56:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3140. [2020-10-26 22:56:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2020-10-26 22:56:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4359 transitions. [2020-10-26 22:56:51,325 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4359 transitions. Word has length 140 [2020-10-26 22:56:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:51,326 INFO L481 AbstractCegarLoop]: Abstraction has 3140 states and 4359 transitions. [2020-10-26 22:56:51,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:56:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4359 transitions. [2020-10-26 22:56:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-26 22:56:51,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:51,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:56:51,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:56:51,329 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:51,334 INFO L82 PathProgramCache]: Analyzing trace with hash -566518592, now seen corresponding path program 1 times [2020-10-26 22:56:51,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:51,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454094491] [2020-10-26 22:56:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:51,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:51,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:52,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:52,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-26 22:56:52,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:56:52,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1034 [2020-10-26 22:56:52,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:52,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 22:56:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:52,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:52,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:52,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:52,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:52,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:56:52,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:52,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:52,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:52,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:52,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:52,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 22:56:52,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:52,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 22:56:52,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:52,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:52,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:52,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:56:52,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:52,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454094491] [2020-10-26 22:56:52,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:52,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:56:52,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058662350] [2020-10-26 22:56:52,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:56:52,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:52,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:56:52,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:56:52,862 INFO L87 Difference]: Start difference. First operand 3140 states and 4359 transitions. Second operand 7 states. [2020-10-26 22:57:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:07,707 INFO L93 Difference]: Finished difference Result 9710 states and 13877 transitions. [2020-10-26 22:57:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:57:07,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-10-26 22:57:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:07,753 INFO L225 Difference]: With dead ends: 9710 [2020-10-26 22:57:07,754 INFO L226 Difference]: Without dead ends: 6576 [2020-10-26 22:57:07,766 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 [2020-10-26 22:57:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2020-10-26 22:57:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 6413. [2020-10-26 22:57:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6413 states. [2020-10-26 22:57:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 8031 transitions. [2020-10-26 22:57:08,037 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 8031 transitions. Word has length 142 [2020-10-26 22:57:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:08,039 INFO L481 AbstractCegarLoop]: Abstraction has 6413 states and 8031 transitions. [2020-10-26 22:57:08,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 8031 transitions. [2020-10-26 22:57:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 22:57:08,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:08,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:08,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:57:08,043 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:08,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1001291522, now seen corresponding path program 1 times [2020-10-26 22:57:08,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:08,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048485190] [2020-10-26 22:57:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:08,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:08,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:09,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:09,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-26 22:57:09,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:57:09,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-26 22:57:09,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:09,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:09,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:57:09,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 22:57:09,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:09,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:09,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:09,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:09,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:09,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:09,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 22:57:09,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:09,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:09,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:09,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:57:09,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:09,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:09,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:09,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:57:09,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:09,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-26 22:57:09,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:09,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:09,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:09,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:57:09,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:57:09,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048485190] [2020-10-26 22:57:09,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:57:09,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 22:57:09,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204777476] [2020-10-26 22:57:09,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:57:09,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:57:09,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:57:09,508 INFO L87 Difference]: Start difference. First operand 6413 states and 8031 transitions. Second operand 8 states. [2020-10-26 22:57:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:24,858 INFO L93 Difference]: Finished difference Result 19554 states and 25581 transitions. [2020-10-26 22:57:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:57:24,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2020-10-26 22:57:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:24,927 INFO L225 Difference]: With dead ends: 19554 [2020-10-26 22:57:24,927 INFO L226 Difference]: Without dead ends: 13147 [2020-10-26 22:57:24,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:57:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13147 states. [2020-10-26 22:57:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13147 to 13022. [2020-10-26 22:57:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13022 states. [2020-10-26 22:57:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13022 states to 13022 states and 16665 transitions. [2020-10-26 22:57:25,334 INFO L78 Accepts]: Start accepts. Automaton has 13022 states and 16665 transitions. Word has length 153 [2020-10-26 22:57:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:25,334 INFO L481 AbstractCegarLoop]: Abstraction has 13022 states and 16665 transitions. [2020-10-26 22:57:25,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:57:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 13022 states and 16665 transitions. [2020-10-26 22:57:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-26 22:57:25,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:25,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:25,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:57:25,338 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1186986786, now seen corresponding path program 1 times [2020-10-26 22:57:25,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:25,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679186315] [2020-10-26 22:57:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:25,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:25,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:26,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:26,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-26 22:57:26,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:57:26,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-26 22:57:26,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:57:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-26 22:57:26,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:26,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:26,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:26,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:26,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:26,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:26,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 22:57:26,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:26,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:26,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:57:26,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:26,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:26,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:27,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:27,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:57:27,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:27,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-26 22:57:27,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 22:57:27,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:57:27,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679186315] [2020-10-26 22:57:27,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:57:27,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:57:27,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148215106] [2020-10-26 22:57:27,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:57:27,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:27,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:57:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:57:27,152 INFO L87 Difference]: Start difference. First operand 13022 states and 16665 transitions. Second operand 7 states. [2020-10-26 22:57:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:40,714 INFO L93 Difference]: Finished difference Result 27514 states and 35555 transitions. [2020-10-26 22:57:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:57:40,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 167 [2020-10-26 22:57:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:40,800 INFO L225 Difference]: With dead ends: 27514 [2020-10-26 22:57:40,800 INFO L226 Difference]: Without dead ends: 14498 [2020-10-26 22:57:40,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:57:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14498 states. [2020-10-26 22:57:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14498 to 14023. [2020-10-26 22:57:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14023 states. [2020-10-26 22:57:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14023 states to 14023 states and 17820 transitions. [2020-10-26 22:57:41,421 INFO L78 Accepts]: Start accepts. Automaton has 14023 states and 17820 transitions. Word has length 167 [2020-10-26 22:57:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:41,422 INFO L481 AbstractCegarLoop]: Abstraction has 14023 states and 17820 transitions. [2020-10-26 22:57:41,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 14023 states and 17820 transitions. [2020-10-26 22:57:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 22:57:41,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:41,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:41,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:57:41,427 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:41,428 INFO L82 PathProgramCache]: Analyzing trace with hash 167421556, now seen corresponding path program 1 times [2020-10-26 22:57:41,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:41,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713158353] [2020-10-26 22:57:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:41,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:43,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:43,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 22:57:43,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:57:43,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2096 [2020-10-26 22:57:43,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:57:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:57:43,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:43,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:43,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:43,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:43,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:43,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:43,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:57:43,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:57:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:43,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:43,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:44,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:44,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:57:44,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:44,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-26 22:57:44,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:44,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:44,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:44,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:57:44,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:57:44,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713158353] [2020-10-26 22:57:44,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:57:44,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:57:44,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839741591] [2020-10-26 22:57:44,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:57:44,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:44,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:57:44,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:57:44,794 INFO L87 Difference]: Start difference. First operand 14023 states and 17820 transitions. Second operand 7 states. [2020-10-26 22:57:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:57,689 INFO L93 Difference]: Finished difference Result 27688 states and 35701 transitions. [2020-10-26 22:57:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:57:57,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 212 [2020-10-26 22:57:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:57,761 INFO L225 Difference]: With dead ends: 27688 [2020-10-26 22:57:57,762 INFO L226 Difference]: Without dead ends: 14438 [2020-10-26 22:57:57,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:57:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14438 states. [2020-10-26 22:57:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14438 to 14071. [2020-10-26 22:57:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14071 states. [2020-10-26 22:57:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14071 states to 14071 states and 17873 transitions. [2020-10-26 22:57:58,194 INFO L78 Accepts]: Start accepts. Automaton has 14071 states and 17873 transitions. Word has length 212 [2020-10-26 22:57:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:58,195 INFO L481 AbstractCegarLoop]: Abstraction has 14071 states and 17873 transitions. [2020-10-26 22:57:58,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 14071 states and 17873 transitions. [2020-10-26 22:57:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-26 22:57:58,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:58,202 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:58,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:57:58,203 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash -712377196, now seen corresponding path program 1 times [2020-10-26 22:57:58,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:58,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202926206] [2020-10-26 22:57:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:58,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:58,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:58,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:01,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:01,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-26 22:58:01,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:58:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3072 [2020-10-26 22:58:01,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:58:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:58:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-26 22:58:01,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:58:01,585 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:58:01,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:01,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:01,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:01,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:01,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:01,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:58:01,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:01,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:01,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:01,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:01,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:58:01,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:01,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:01,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:01,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:58:01,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:01,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-26 22:58:01,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:01,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:01,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:01,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:58:01,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:02,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:58:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:02,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:02,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:02,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:02,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:58:02,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:58:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-26 22:58:02,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:58:02,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:58:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 192 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:58:02,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202926206] [2020-10-26 22:58:02,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:02,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:58:02,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127759974] [2020-10-26 22:58:02,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:58:02,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:58:02,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:58:02,847 INFO L87 Difference]: Start difference. First operand 14071 states and 17873 transitions. Second operand 6 states. [2020-10-26 22:58:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:18,255 INFO L93 Difference]: Finished difference Result 27669 states and 35967 transitions. [2020-10-26 22:58:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 22:58:18,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 302 [2020-10-26 22:58:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:18,317 INFO L225 Difference]: With dead ends: 27669 [2020-10-26 22:58:18,317 INFO L226 Difference]: Without dead ends: 14371 [2020-10-26 22:58:18,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:58:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14371 states. [2020-10-26 22:58:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14371 to 13369. [2020-10-26 22:58:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13369 states. [2020-10-26 22:58:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 16564 transitions. [2020-10-26 22:58:18,815 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 16564 transitions. Word has length 302 [2020-10-26 22:58:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:18,817 INFO L481 AbstractCegarLoop]: Abstraction has 13369 states and 16564 transitions. [2020-10-26 22:58:18,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:58:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 16564 transitions. [2020-10-26 22:58:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-26 22:58:18,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:18,825 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:18,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:58:18,825 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash -145631150, now seen corresponding path program 1 times [2020-10-26 22:58:18,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:18,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844756580] [2020-10-26 22:58:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:21,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:21,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-26 22:58:21,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:58:21,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2632 [2020-10-26 22:58:21,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:58:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:58:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:58:21,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:21,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:21,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:21,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:21,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:21,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:58:21,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:21,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:21,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:21,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:21,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:21,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:21,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:58:21,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:21,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 22:58:21,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:21,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:21,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:21,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:58:21,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:22,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:58:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:22,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:22,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:22,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:22,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:58:22,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:58:22,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 22:58:22,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:58:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 141 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:58:22,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844756580] [2020-10-26 22:58:22,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:22,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:58:22,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278726887] [2020-10-26 22:58:22,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:58:22,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:58:22,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:58:22,383 INFO L87 Difference]: Start difference. First operand 13369 states and 16564 transitions. Second operand 6 states. [2020-10-26 22:58:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:39,423 INFO L93 Difference]: Finished difference Result 37624 states and 50438 transitions. [2020-10-26 22:58:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:58:39,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 303 [2020-10-26 22:58:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:39,515 INFO L225 Difference]: With dead ends: 37624 [2020-10-26 22:58:39,515 INFO L226 Difference]: Without dead ends: 25028 [2020-10-26 22:58:39,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:58:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25028 states. [2020-10-26 22:58:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25028 to 24689. [2020-10-26 22:58:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24689 states. [2020-10-26 22:58:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24689 states to 24689 states and 30043 transitions. [2020-10-26 22:58:40,160 INFO L78 Accepts]: Start accepts. Automaton has 24689 states and 30043 transitions. Word has length 303 [2020-10-26 22:58:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:40,161 INFO L481 AbstractCegarLoop]: Abstraction has 24689 states and 30043 transitions. [2020-10-26 22:58:40,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:58:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 24689 states and 30043 transitions. [2020-10-26 22:58:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-26 22:58:40,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:40,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:40,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:58:40,168 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash -872491344, now seen corresponding path program 1 times [2020-10-26 22:58:40,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:40,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354980126] [2020-10-26 22:58:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:40,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:41,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:41,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-26 22:58:41,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:41,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-26 22:58:41,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:41,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:41,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-26 22:58:41,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 22:58:41,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:41,287 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:58:41,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:41,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:41,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:41,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:41,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:41,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:58:41,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:41,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:41,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:41,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:41,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:41,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:41,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:41,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:41,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:58:41,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:41,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 22:58:41,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:41,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:41,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:41,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:41,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:41,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:58:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:41,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:41,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:41,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:58:41,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:41,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 22:58:41,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:41,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:58:41,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 22:58:41,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354980126] [2020-10-26 22:58:41,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:41,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:58:41,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841707236] [2020-10-26 22:58:41,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:58:41,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:41,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:58:41,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:58:41,787 INFO L87 Difference]: Start difference. First operand 24689 states and 30043 transitions. Second operand 6 states. [2020-10-26 22:59:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:03,701 INFO L93 Difference]: Finished difference Result 59653 states and 75799 transitions. [2020-10-26 22:59:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:59:03,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 312 [2020-10-26 22:59:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:03,812 INFO L225 Difference]: With dead ends: 59653 [2020-10-26 22:59:03,812 INFO L226 Difference]: Without dead ends: 35737 [2020-10-26 22:59:03,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:59:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35737 states. [2020-10-26 22:59:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35737 to 30230. [2020-10-26 22:59:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30230 states. [2020-10-26 22:59:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30230 states to 30230 states and 37240 transitions. [2020-10-26 22:59:04,581 INFO L78 Accepts]: Start accepts. Automaton has 30230 states and 37240 transitions. Word has length 312 [2020-10-26 22:59:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:04,582 INFO L481 AbstractCegarLoop]: Abstraction has 30230 states and 37240 transitions. [2020-10-26 22:59:04,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:59:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 30230 states and 37240 transitions. [2020-10-26 22:59:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-10-26 22:59:04,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:04,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:59:04,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:59:04,600 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash 311586536, now seen corresponding path program 1 times [2020-10-26 22:59:04,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:04,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604283216] [2020-10-26 22:59:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:04,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:04,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:07,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:09,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:09,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 460 [2020-10-26 22:59:09,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:59:09,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-26 22:59:09,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:09,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:09,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:59:09,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:59:09,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:09,942 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:59:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:59:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:09,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:09,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:09,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:59:09,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 22:59:09,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:09,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:09,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:59:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:10,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:10,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:10,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:59:10,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 22:59:10,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:59:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:59:10,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:10,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:59:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:10,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:10,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:10,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 22:59:10,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:10,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-26 22:59:10,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:59:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 22:59:10,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:10,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-10-26 22:59:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:10,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:10,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 22:59:10,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:10,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 22:59:10,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:10,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:10,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 150 [2020-10-26 22:59:10,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:10,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 252 proven. 82 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 22:59:10,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604283216] [2020-10-26 22:59:10,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:59:10,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:59:10,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722615312] [2020-10-26 22:59:10,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:59:10,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:59:10,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:59:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:59:10,783 INFO L87 Difference]: Start difference. First operand 30230 states and 37240 transitions. Second operand 7 states. [2020-10-26 22:59:10,942 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:59:32,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:32,481 INFO L93 Difference]: Finished difference Result 75448 states and 96924 transitions. [2020-10-26 22:59:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:59:32,483 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 444 [2020-10-26 22:59:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:32,635 INFO L225 Difference]: With dead ends: 75448 [2020-10-26 22:59:32,636 INFO L226 Difference]: Without dead ends: 45991 [2020-10-26 22:59:32,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:59:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45991 states. [2020-10-26 22:59:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45991 to 45690. [2020-10-26 22:59:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45690 states. [2020-10-26 22:59:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45690 states to 45690 states and 57375 transitions. [2020-10-26 22:59:34,002 INFO L78 Accepts]: Start accepts. Automaton has 45690 states and 57375 transitions. Word has length 444 [2020-10-26 22:59:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:34,003 INFO L481 AbstractCegarLoop]: Abstraction has 45690 states and 57375 transitions. [2020-10-26 22:59:34,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:59:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45690 states and 57375 transitions. [2020-10-26 22:59:34,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-10-26 22:59:34,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:34,032 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:59:34,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:59:34,033 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash 418158912, now seen corresponding path program 1 times [2020-10-26 22:59:34,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:34,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953069930] [2020-10-26 22:59:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:34,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:36,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:36,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:36,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 480 [2020-10-26 22:59:36,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:59:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2788 [2020-10-26 22:59:36,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-26 22:59:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-26 22:59:36,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:37,231 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:59:37,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:59:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:37,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:37,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:37,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:59:37,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:37,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:59:37,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:37,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:59:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:37,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:37,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:37,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:59:37,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:37,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 22:59:37,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:37,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:37,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:37,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:37,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:37,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:59:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:37,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:37,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:59:37,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:37,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 22:59:37,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:37,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:59:37,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:37,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:59:37,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:37,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-10-26 22:59:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:37,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:37,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:37,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 22:59:37,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:37,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-26 22:59:37,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:37,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:59:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-26 22:59:37,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:59:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-26 22:59:38,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953069930] [2020-10-26 22:59:38,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:59:38,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:59:38,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951295721] [2020-10-26 22:59:38,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:59:38,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:59:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:59:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:59:38,178 INFO L87 Difference]: Start difference. First operand 45690 states and 57375 transitions. Second operand 8 states. [2020-10-26 22:59:41,748 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66