/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:02:54,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:02:54,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:02:54,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:02:54,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:02:54,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:02:54,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:02:54,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:02:54,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:02:54,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:02:54,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:02:54,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:02:54,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:02:54,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:02:54,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:02:54,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:02:54,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:02:54,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:02:54,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:02:54,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:02:54,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:02:54,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:02:54,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:02:54,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:02:54,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:02:54,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:02:54,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:02:54,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:02:54,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:02:54,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:02:54,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:02:54,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:02:54,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:02:54,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:02:54,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:02:54,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:02:54,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:02:54,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:02:54,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:02:54,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:02:54,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:02:54,243 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 [2020-09-25 00:02:54,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:02:54,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:02:54,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:02:54,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:02:54,272 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:02:54,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:02:54,273 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:02:54,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:02:54,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:02:54,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:02:54,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:02:54,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:02:54,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:02:54,274 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:02:54,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:02:54,275 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:02:54,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:02:54,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:02:54,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:02:54,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:02:54,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:02:54,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:02:54,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:02:54,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:02:54,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:02:54,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:02:54,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:02:54,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:02:54,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:02:54,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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; 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; 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; 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; 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; [2020-09-25 00:02:54,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:02:54,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:02:54,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:02:54,830 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:02:54,832 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:02:54,833 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-25 00:02:54,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edbcd991c/1fda49944cfc4c1086166194973cfdf8/FLAG0224d5074 [2020-09-25 00:02:55,473 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:02:55,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-25 00:02:55,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edbcd991c/1fda49944cfc4c1086166194973cfdf8/FLAG0224d5074 [2020-09-25 00:02:55,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edbcd991c/1fda49944cfc4c1086166194973cfdf8 [2020-09-25 00:02:55,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:02:55,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:02:55,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:02:55,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:02:55,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:02:55,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:02:55" (1/1) ... [2020-09-25 00:02:55,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f43d38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:55, skipping insertion in model container [2020-09-25 00:02:55,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:02:55" (1/1) ... [2020-09-25 00:02:55,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:02:55,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:02:56,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:02:56,226 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:02:56,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:02:56,270 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:02:56,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56 WrapperNode [2020-09-25 00:02:56,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:02:56,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:02:56,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:02:56,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:02:56,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (1/1) ... [2020-09-25 00:02:56,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (1/1) ... [2020-09-25 00:02:56,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (1/1) ... [2020-09-25 00:02:56,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (1/1) ... [2020-09-25 00:02:56,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (1/1) ... [2020-09-25 00:02:56,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (1/1) ... [2020-09-25 00:02:56,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (1/1) ... [2020-09-25 00:02:56,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:02:56,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:02:56,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:02:56,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:02:56,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (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 [2020-09-25 00:02:56,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:02:56,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:02:56,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:02:56,474 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 00:02:56,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:02:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 00:02:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:02:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:02:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 00:02:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 00:02:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 00:02:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:02:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:02:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 00:02:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:02:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:02:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:02:56,788 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:02:56,789 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 00:02:56,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:02:56 BoogieIcfgContainer [2020-09-25 00:02:56,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:02:56,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:02:56,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:02:56,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:02:56,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:02:55" (1/3) ... [2020-09-25 00:02:56,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4779cf79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:02:56, skipping insertion in model container [2020-09-25 00:02:56,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:56" (2/3) ... [2020-09-25 00:02:56,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4779cf79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:02:56, skipping insertion in model container [2020-09-25 00:02:56,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:02:56" (3/3) ... [2020-09-25 00:02:56,806 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-25 00:02:56,822 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:02:56,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:02:56,857 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:02:56,892 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:02:56,893 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:02:56,893 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:02:56,893 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:02:56,893 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:02:56,893 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:02:56,894 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:02:56,894 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:02:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 00:02:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 00:02:56,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:02:56,927 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] [2020-09-25 00:02:56,928 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:02:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:02:56,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-25 00:02:56,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:02:56,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101770307] [2020-09-25 00:02:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:02:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:57,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:57,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:57,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:57,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 00:02:57,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:02:57,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-09-25 00:02:57,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:57,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:02:57,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 00:02:57,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:02:57,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:02:57,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:02:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:57,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:57,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:57,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:02:57,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:57,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 00:02:57,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:02:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:02:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:02:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:02:57,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:02:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:57,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:57,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:57,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 00:02:57,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:57,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 00:02:57,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:02:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:02:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:02:57,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:02:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:02:57,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101770307] [2020-09-25 00:02:57,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:02:57,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:02:57,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754053143] [2020-09-25 00:02:57,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:02:57,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:02:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:02:57,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:02:57,593 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-25 00:02:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:02:57,831 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-25 00:02:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 00:02:57,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 00:02:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:02:57,848 INFO L225 Difference]: With dead ends: 94 [2020-09-25 00:02:57,849 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 00:02:57,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:02:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 00:02:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-25 00:02:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 00:02:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-25 00:02:57,909 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-25 00:02:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:02:57,910 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-25 00:02:57,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:02:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-25 00:02:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 00:02:57,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:02:57,912 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] [2020-09-25 00:02:57,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:02:57,913 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:02:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:02:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-09-25 00:02:57,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:02:57,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418493849] [2020-09-25 00:02:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:02:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:57,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:58,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:58,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 00:02:58,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:02:58,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-09-25 00:02:58,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:58,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:02:58,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:02:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:02:58,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:02:58,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:02:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:58,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:58,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:58,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:02:58,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:58,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:02:58,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:58,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:02:58,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:02:58,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:02:58,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:02:58,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:02:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:58,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:58,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:58,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 00:02:58,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:58,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 00:02:58,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:58,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:02:58,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:02:58,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:02:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:02:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:02:58,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418493849] [2020-09-25 00:02:58,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:02:58,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 00:02:58,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867434981] [2020-09-25 00:02:58,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 00:02:58,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:02:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 00:02:58,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:02:58,537 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-09-25 00:02:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:02:58,845 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-25 00:02:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:02:58,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-25 00:02:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:02:58,847 INFO L225 Difference]: With dead ends: 81 [2020-09-25 00:02:58,847 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 00:02:58,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:02:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 00:02:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-25 00:02:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 00:02:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 00:02:58,868 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 00:02:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:02:58,870 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 00:02:58,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 00:02:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 00:02:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 00:02:58,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:02:58,874 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] [2020-09-25 00:02:58,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:02:58,875 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:02:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:02:58,875 INFO L82 PathProgramCache]: Analyzing trace with hash -579567659, now seen corresponding path program 1 times [2020-09-25 00:02:58,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:02:58,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403051190] [2020-09-25 00:02:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:02:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:58,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 00:02:59,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:02:59,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-09-25 00:02:59,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:02:59,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:02:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 00:02:59,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:02:59,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:02:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:59,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:02:59,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:59,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:02:59,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:02:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:02:59,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:02:59,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:02:59,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:02:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:59,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 00:02:59,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:59,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-25 00:02:59,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:02:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:02:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 00:02:59,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:02:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:02:59,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403051190] [2020-09-25 00:02:59,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:02:59,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 00:02:59,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434736118] [2020-09-25 00:02:59,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:02:59,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:02:59,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:02:59,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:02:59,657 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-25 00:03:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:00,008 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-25 00:03:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 00:03:00,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-25 00:03:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:00,010 INFO L225 Difference]: With dead ends: 87 [2020-09-25 00:03:00,010 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 00:03:00,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:03:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 00:03:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-25 00:03:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 00:03:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-09-25 00:03:00,021 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-09-25 00:03:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:00,021 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-09-25 00:03:00,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:03:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-09-25 00:03:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 00:03:00,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:00,023 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 00:03:00,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:03:00,024 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:00,024 INFO L82 PathProgramCache]: Analyzing trace with hash 556324561, now seen corresponding path program 2 times [2020-09-25 00:03:00,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:00,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530126121] [2020-09-25 00:03:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:00,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:00,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:00,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:00,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 00:03:00,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:00,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-09-25 00:03:00,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:03:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:00,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 00:03:00,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:00,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:00,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:00,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:00,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:00,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:00,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 00:03:00,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:00,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:00,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:00,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:00,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:00,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:00,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:00,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:00,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 00:03:00,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:00,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-25 00:03:00,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:03:00,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:00,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 00:03:00,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:01,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530126121] [2020-09-25 00:03:01,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:01,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:03:01,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375011559] [2020-09-25 00:03:01,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:03:01,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:03:01,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:03:01,293 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-09-25 00:03:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:01,757 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-09-25 00:03:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 00:03:01,757 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-25 00:03:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:01,759 INFO L225 Difference]: With dead ends: 93 [2020-09-25 00:03:01,759 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 00:03:01,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:03:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 00:03:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-09-25 00:03:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 00:03:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-25 00:03:01,769 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 41 [2020-09-25 00:03:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:01,769 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-25 00:03:01,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:03:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-25 00:03:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 00:03:01,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:01,771 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:01,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:03:01,772 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash 946274509, now seen corresponding path program 3 times [2020-09-25 00:03:01,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:01,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146567228] [2020-09-25 00:03:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:01,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:01,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:02,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:02,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 00:03:02,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:02,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-09-25 00:03:02,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:03:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 00:03:02,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:02,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:02,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:02,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:02,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:02,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:02,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:03:02,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:02,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:02,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:02,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:02,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:02,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 00:03:02,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:02,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-09-25 00:03:02,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:02,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:03:02,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:02,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 00:03:02,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:03,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146567228] [2020-09-25 00:03:03,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:03,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:03:03,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584281685] [2020-09-25 00:03:03,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:03:03,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:03,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:03:03,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:03:03,280 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 13 states. [2020-09-25 00:03:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:03,950 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2020-09-25 00:03:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 00:03:03,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-09-25 00:03:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:03,952 INFO L225 Difference]: With dead ends: 99 [2020-09-25 00:03:03,952 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 00:03:03,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:03:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 00:03:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-09-25 00:03:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 00:03:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-09-25 00:03:03,968 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 47 [2020-09-25 00:03:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:03,972 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-09-25 00:03:03,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:03:03,972 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-09-25 00:03:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 00:03:03,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:03,975 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:03,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:03:03,975 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:03,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1531231689, now seen corresponding path program 4 times [2020-09-25 00:03:03,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:03,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104689359] [2020-09-25 00:03:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:04,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:04,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:05,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 00:03:05,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:05,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-09-25 00:03:05,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:05,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:03:05,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:05,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 00:03:05,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:05,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:05,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:05,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:05,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:05,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:03:05,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:05,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:05,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:05,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 00:03:05,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:05,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-09-25 00:03:05,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:05,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:03:05,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:05,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 00:03:05,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:06,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104689359] [2020-09-25 00:03:06,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:06,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 00:03:06,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983002393] [2020-09-25 00:03:06,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 00:03:06,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 00:03:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:03:06,044 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-09-25 00:03:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:06,609 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2020-09-25 00:03:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 00:03:06,609 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-09-25 00:03:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:06,611 INFO L225 Difference]: With dead ends: 105 [2020-09-25 00:03:06,611 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 00:03:06,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-09-25 00:03:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 00:03:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-09-25 00:03:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 00:03:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-09-25 00:03:06,620 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 53 [2020-09-25 00:03:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:06,621 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-09-25 00:03:06,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 00:03:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-09-25 00:03:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 00:03:06,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:06,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:06,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:03:06,625 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:06,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1250414021, now seen corresponding path program 5 times [2020-09-25 00:03:06,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:06,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368318874] [2020-09-25 00:03:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:06,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:06,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:07,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:07,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 00:03:07,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:07,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-09-25 00:03:07,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:07,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:03:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 00:03:07,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:07,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:07,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:07,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:07,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:07,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:07,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:03:07,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:07,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:07,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:07,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:08,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:08,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:08,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 00:03:08,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:08,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-09-25 00:03:08,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:08,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:03:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 00:03:08,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:08,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368318874] [2020-09-25 00:03:08,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:08,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 00:03:08,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538546696] [2020-09-25 00:03:08,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 00:03:08,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:08,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 00:03:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:03:08,755 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 17 states. [2020-09-25 00:03:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:09,377 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-09-25 00:03:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 00:03:09,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-09-25 00:03:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:09,379 INFO L225 Difference]: With dead ends: 111 [2020-09-25 00:03:09,379 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 00:03:09,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 00:03:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 00:03:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-09-25 00:03:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-25 00:03:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-09-25 00:03:09,398 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 59 [2020-09-25 00:03:09,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:09,398 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-09-25 00:03:09,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 00:03:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-09-25 00:03:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 00:03:09,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:09,400 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:09,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:03:09,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:09,400 INFO L82 PathProgramCache]: Analyzing trace with hash 195424449, now seen corresponding path program 6 times [2020-09-25 00:03:09,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:09,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603100207] [2020-09-25 00:03:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:09,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:11,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:11,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 00:03:11,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:11,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1810 [2020-09-25 00:03:11,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:11,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:03:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 00:03:11,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:11,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:11,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:11,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:11,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:11,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:11,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:03:11,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:11,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:11,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:11,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:11,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:11,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:11,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:11,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 00:03:11,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:11,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-09-25 00:03:11,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:11,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:03:11,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:11,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 00:03:11,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:12,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603100207] [2020-09-25 00:03:12,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:12,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 00:03:12,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100315491] [2020-09-25 00:03:12,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 00:03:12,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 00:03:12,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:03:12,132 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 19 states. [2020-09-25 00:03:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:13,207 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-09-25 00:03:13,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 00:03:13,208 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-09-25 00:03:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:13,209 INFO L225 Difference]: With dead ends: 117 [2020-09-25 00:03:13,210 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 00:03:13,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-25 00:03:13,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 00:03:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-09-25 00:03:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 00:03:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-09-25 00:03:13,235 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 65 [2020-09-25 00:03:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:13,239 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-09-25 00:03:13,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 00:03:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-09-25 00:03:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 00:03:13,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:13,243 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:13,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:03:13,244 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1530599747, now seen corresponding path program 7 times [2020-09-25 00:03:13,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:13,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191501774] [2020-09-25 00:03:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:13,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:13,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:15,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:15,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 00:03:15,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:15,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2226 [2020-09-25 00:03:15,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:15,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:03:15,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:15,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 00:03:15,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:03:15,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:15,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:15,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:15,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:15,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:15,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:03:15,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:15,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:15,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:15,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:15,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:15,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:15,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:16,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:16,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:03:16,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-09-25 00:03:16,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:03:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:16,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 00:03:16,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:17,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191501774] [2020-09-25 00:03:17,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:17,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 00:03:17,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278327728] [2020-09-25 00:03:17,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 00:03:17,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 00:03:17,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-09-25 00:03:17,291 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2020-09-25 00:03:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:18,414 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-09-25 00:03:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 00:03:18,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-09-25 00:03:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:18,417 INFO L225 Difference]: With dead ends: 123 [2020-09-25 00:03:18,418 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 00:03:18,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 00:03:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 00:03:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-09-25 00:03:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 00:03:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-09-25 00:03:18,443 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 71 [2020-09-25 00:03:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:18,445 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-09-25 00:03:18,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 00:03:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-09-25 00:03:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 00:03:18,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:18,447 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:18,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:03:18,448 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash -658870343, now seen corresponding path program 8 times [2020-09-25 00:03:18,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:18,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958697118] [2020-09-25 00:03:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:18,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:18,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:21,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:21,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 00:03:21,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:21,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2580 [2020-09-25 00:03:21,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:03:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 00:03:21,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:21,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:21,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:21,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:21,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:21,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:21,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:03:21,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:21,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:21,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:21,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:21,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:21,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:21,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:21,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:21,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 00:03:21,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:21,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-09-25 00:03:21,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:03:21,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:21,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 00:03:21,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:22,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958697118] [2020-09-25 00:03:22,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:22,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 00:03:22,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471314540] [2020-09-25 00:03:22,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 00:03:22,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:22,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 00:03:22,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:03:22,300 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 23 states. [2020-09-25 00:03:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:23,443 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-09-25 00:03:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 00:03:23,444 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-09-25 00:03:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:23,445 INFO L225 Difference]: With dead ends: 129 [2020-09-25 00:03:23,445 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 00:03:23,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=656, Invalid=1996, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 00:03:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 00:03:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-09-25 00:03:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-25 00:03:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-09-25 00:03:23,462 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 77 [2020-09-25 00:03:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:23,463 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-09-25 00:03:23,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 00:03:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-09-25 00:03:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 00:03:23,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:23,466 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:23,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:03:23,466 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:23,467 INFO L82 PathProgramCache]: Analyzing trace with hash -485733451, now seen corresponding path program 9 times [2020-09-25 00:03:23,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:23,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004191994] [2020-09-25 00:03:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:23,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:23,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:26,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:26,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-25 00:03:26,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:26,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2939 [2020-09-25 00:03:26,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:26,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 00:03:26,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:26,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-25 00:03:26,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:26,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:26,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:26,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:26,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:26,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:26,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:03:26,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:26,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:26,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:26,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:27,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:27,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 00:03:27,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:27,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-09-25 00:03:27,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:27,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 00:03:27,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:27,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 00:03:27,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:27,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004191994] [2020-09-25 00:03:27,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:27,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-25 00:03:27,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833149118] [2020-09-25 00:03:27,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-25 00:03:27,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:27,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-25 00:03:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-09-25 00:03:27,895 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 25 states. [2020-09-25 00:03:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:29,157 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2020-09-25 00:03:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 00:03:29,158 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 83 [2020-09-25 00:03:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:29,160 INFO L225 Difference]: With dead ends: 135 [2020-09-25 00:03:29,160 INFO L226 Difference]: Without dead ends: 108 [2020-09-25 00:03:29,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=796, Invalid=2396, Unknown=0, NotChecked=0, Total=3192 [2020-09-25 00:03:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-25 00:03:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-09-25 00:03:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 00:03:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-09-25 00:03:29,171 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 83 [2020-09-25 00:03:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:29,173 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-09-25 00:03:29,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-25 00:03:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-09-25 00:03:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 00:03:29,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:29,174 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:29,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:03:29,175 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash 871381681, now seen corresponding path program 10 times [2020-09-25 00:03:29,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:29,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428652395] [2020-09-25 00:03:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:29,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:32,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:32,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 00:03:32,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:32,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3247 [2020-09-25 00:03:32,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:32,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 00:03:32,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:32,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 00:03:32,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:32,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:32,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:32,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:32,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:32,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:32,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:03:32,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:32,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:32,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:32,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:32,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:33,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:33,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 00:03:33,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:33,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-09-25 00:03:33,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 00:03:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-25 00:03:33,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:34,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428652395] [2020-09-25 00:03:34,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:34,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-25 00:03:34,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187364655] [2020-09-25 00:03:34,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-25 00:03:34,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:34,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-25 00:03:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2020-09-25 00:03:34,108 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 27 states. [2020-09-25 00:03:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:35,647 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2020-09-25 00:03:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 00:03:35,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 89 [2020-09-25 00:03:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:35,649 INFO L225 Difference]: With dead ends: 141 [2020-09-25 00:03:35,649 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 00:03:35,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=936, Invalid=2724, Unknown=0, NotChecked=0, Total=3660 [2020-09-25 00:03:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 00:03:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-09-25 00:03:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 00:03:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-09-25 00:03:35,657 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 89 [2020-09-25 00:03:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:35,657 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-09-25 00:03:35,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-25 00:03:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-09-25 00:03:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-25 00:03:35,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:35,659 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:35,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:03:35,659 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash 743177389, now seen corresponding path program 11 times [2020-09-25 00:03:35,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:35,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525683762] [2020-09-25 00:03:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:35,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:35,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:38,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:38,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 00:03:38,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:38,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3111 [2020-09-25 00:03:38,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 00:03:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 00:03:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-25 00:03:38,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:38,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:38,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:03:38,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:38,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:03:38,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:38,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:38,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:03:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:38,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:40,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:40,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 00:03:40,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:40,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1347 [2020-09-25 00:03:40,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:40,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 00:03:40,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:03:40,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-25 00:03:40,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:40,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525683762] [2020-09-25 00:03:40,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:40,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-25 00:03:40,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180007479] [2020-09-25 00:03:40,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-25 00:03:40,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-25 00:03:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-09-25 00:03:40,763 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 29 states. [2020-09-25 00:03:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:42,589 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2020-09-25 00:03:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-25 00:03:42,590 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-09-25 00:03:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:42,591 INFO L225 Difference]: With dead ends: 147 [2020-09-25 00:03:42,592 INFO L226 Difference]: Without dead ends: 120 [2020-09-25 00:03:42,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1118, Invalid=3304, Unknown=0, NotChecked=0, Total=4422 [2020-09-25 00:03:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-25 00:03:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-09-25 00:03:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-25 00:03:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-09-25 00:03:42,600 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 95 [2020-09-25 00:03:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:42,600 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-09-25 00:03:42,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-25 00:03:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-09-25 00:03:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-25 00:03:42,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:42,602 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:42,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 00:03:42,602 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash -642428503, now seen corresponding path program 12 times [2020-09-25 00:03:42,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:42,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364579900] [2020-09-25 00:03:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:42,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:42,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking...