/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:51:03,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:51:03,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:51:03,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:51:03,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:51:03,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:51:03,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:51:03,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:51:03,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:51:03,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:51:03,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:51:03,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:51:03,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:51:03,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:51:03,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:51:03,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:51:03,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:51:03,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:51:03,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:51:03,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:51:03,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:51:03,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:51:03,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:51:03,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:51:03,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:51:03,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:51:03,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:51:03,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:51:03,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:51:03,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:51:03,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:51:03,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:51:03,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:51:03,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:51:03,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:51:03,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:51:03,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:51:03,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:51:03,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:51:03,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:51:03,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:51:03,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:51:03,926 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:51:03,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:51:03,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:51:03,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:51:03,928 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:51:03,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:51:03,929 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:51:03,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:51:03,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:51:03,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:51:03,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:51:03,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:51:03,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:51:03,930 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:51:03,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:51:03,931 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:51:03,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:51:03,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:51:03,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:51:03,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:51:03,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:51:03,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:03,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:51:03,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:51:03,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:51:03,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:51:03,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:51:03,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:51:03,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:51:03,934 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:51:04,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:51:04,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:51:04,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:51:04,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:51:04,282 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:51:04,283 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-12 09:51:04,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/572d5c379/3e3c591afb7345f0b1db2a979ab2b1cb/FLAG7f1b501dc [2020-10-12 09:51:04,844 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:51:04,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-12 09:51:04,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/572d5c379/3e3c591afb7345f0b1db2a979ab2b1cb/FLAG7f1b501dc [2020-10-12 09:51:05,228 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/572d5c379/3e3c591afb7345f0b1db2a979ab2b1cb [2020-10-12 09:51:05,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:51:05,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:51:05,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:05,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:51:05,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:51:05,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f931735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05, skipping insertion in model container [2020-10-12 09:51:05,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:51:05,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:51:05,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:05,503 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:51:05,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:05,551 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:51:05,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05 WrapperNode [2020-10-12 09:51:05,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:05,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:51:05,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:51:05,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:05,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (1/1) ... [2020-10-12 09:51:05,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:05,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:05,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:05,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:05,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:05,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:05,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:05,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:05,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:05,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:06,070 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:06,070 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-12 09:51:06,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:06 BoogieIcfgContainer [2020-10-12 09:51:06,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:06,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:06,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:06,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:06,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:51:05" (1/3) ... [2020-10-12 09:51:06,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da729ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:06, skipping insertion in model container [2020-10-12 09:51:06,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:05" (2/3) ... [2020-10-12 09:51:06,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da729ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:06, skipping insertion in model container [2020-10-12 09:51:06,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:06" (3/3) ... [2020-10-12 09:51:06,087 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2020-10-12 09:51:06,102 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:06,111 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:06,132 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:06,161 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:06,162 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:06,162 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:06,162 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:06,162 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:06,162 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:06,162 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:06,163 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-12 09:51:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 09:51:06,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:06,200 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] [2020-10-12 09:51:06,200 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:06,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2095174276, now seen corresponding path program 1 times [2020-10-12 09:51:06,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:06,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815225440] [2020-10-12 09:51:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:06,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:06,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:06,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:06,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:06,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:07,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:07,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 09:51:07,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:07,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1415 [2020-10-12 09:51:07,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:07,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:07,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:07,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:07,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:07,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:07,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:07,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:07,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:07,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:07,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:51:07,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:07,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:07,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:07,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:07,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:07,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815225440] [2020-10-12 09:51:07,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:07,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:07,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022005525] [2020-10-12 09:51:07,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:07,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:07,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:07,920 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2020-10-12 09:51:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:08,099 INFO L93 Difference]: Finished difference Result 80 states and 117 transitions. [2020-10-12 09:51:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:08,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-12 09:51:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:08,115 INFO L225 Difference]: With dead ends: 80 [2020-10-12 09:51:08,115 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:51:08,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:51:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-12 09:51:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:51:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-12 09:51:08,175 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2020-10-12 09:51:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:08,176 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-12 09:51:08,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-12 09:51:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 09:51:08,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:08,179 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] [2020-10-12 09:51:08,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:08,179 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:08,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1810379444, now seen corresponding path program 1 times [2020-10-12 09:51:08,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:08,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553510942] [2020-10-12 09:51:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:13,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 09:51:13,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:51:13,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 09:51:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:13,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:13,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:13,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:13,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:13,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:13,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:13,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:13,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:51:13,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553510942] [2020-10-12 09:51:13,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:13,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:13,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621299896] [2020-10-12 09:51:13,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:13,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:13,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:13,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:13,256 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2020-10-12 09:51:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:13,406 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-10-12 09:51:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:13,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-12 09:51:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:13,408 INFO L225 Difference]: With dead ends: 81 [2020-10-12 09:51:13,409 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:51:13,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:51:13,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-12 09:51:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 09:51:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-12 09:51:13,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 33 [2020-10-12 09:51:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:13,420 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-12 09:51:13,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-12 09:51:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:51:13,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:13,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:13,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:13,422 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1571360162, now seen corresponding path program 2 times [2020-10-12 09:51:13,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:13,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306649252] [2020-10-12 09:51:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:13,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:18,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:51:18,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:18,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:51:18,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:18,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:18,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:51:18,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:18,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:18,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:18,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:18,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:18,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:18,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:18,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 09:51:18,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306649252] [2020-10-12 09:51:18,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:18,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:18,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992798807] [2020-10-12 09:51:18,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:18,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:18,504 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 6 states. [2020-10-12 09:51:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:18,686 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2020-10-12 09:51:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:18,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-12 09:51:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:18,688 INFO L225 Difference]: With dead ends: 99 [2020-10-12 09:51:18,688 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:51:18,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:51:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-10-12 09:51:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:51:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-12 09:51:18,699 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 43 [2020-10-12 09:51:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:18,699 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-12 09:51:18,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-12 09:51:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:51:18,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:18,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-12 09:51:18,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:18,702 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2002852472, now seen corresponding path program 3 times [2020-10-12 09:51:18,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:18,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443086715] [2020-10-12 09:51:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:18,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:23,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:51:23,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:23,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:51:23,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:51:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:51:23,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:51:23,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:23,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:23,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:23,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:23,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:23,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:23,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:23,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:23,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:23,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 09:51:23,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443086715] [2020-10-12 09:51:23,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:23,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:51:23,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107834154] [2020-10-12 09:51:23,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:51:23,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:51:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:23,806 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 7 states. [2020-10-12 09:51:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:24,056 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2020-10-12 09:51:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:51:24,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 09:51:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:24,058 INFO L225 Difference]: With dead ends: 117 [2020-10-12 09:51:24,058 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:51:24,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:51:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-10-12 09:51:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 09:51:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-12 09:51:24,068 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 53 [2020-10-12 09:51:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:24,068 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-12 09:51:24,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:51:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-12 09:51:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 09:51:24,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:24,071 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-12 09:51:24,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:24,071 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1230132174, now seen corresponding path program 4 times [2020-10-12 09:51:24,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:24,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701477781] [2020-10-12 09:51:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:29,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:51:29,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:29,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:51:29,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:51:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 09:51:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:51:29,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:29,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:29,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:29,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:29,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:29,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:29,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:29,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 09:51:29,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701477781] [2020-10-12 09:51:29,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:29,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:51:29,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754777807] [2020-10-12 09:51:29,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:51:29,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:51:29,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:29,160 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 8 states. [2020-10-12 09:51:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:29,374 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2020-10-12 09:51:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:51:29,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-12 09:51:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:29,376 INFO L225 Difference]: With dead ends: 135 [2020-10-12 09:51:29,376 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 09:51:29,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 09:51:29,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-10-12 09:51:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:51:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-12 09:51:29,386 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 63 [2020-10-12 09:51:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:29,387 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-12 09:51:29,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:51:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-12 09:51:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 09:51:29,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:29,388 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2020-10-12 09:51:29,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:29,389 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1642653276, now seen corresponding path program 5 times [2020-10-12 09:51:29,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:29,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797468922] [2020-10-12 09:51:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:29,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 09:51:34,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:34,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:51:34,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:51:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:51:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:51:34,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:34,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:34,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:34,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:34,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:34,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-12 09:51:34,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797468922] [2020-10-12 09:51:34,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:34,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:51:34,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242696003] [2020-10-12 09:51:34,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:51:34,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:51:34,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:34,508 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 9 states. [2020-10-12 09:51:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:34,814 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2020-10-12 09:51:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:51:34,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-10-12 09:51:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:34,815 INFO L225 Difference]: With dead ends: 153 [2020-10-12 09:51:34,815 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 09:51:34,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 09:51:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2020-10-12 09:51:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 09:51:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-12 09:51:34,836 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 73 [2020-10-12 09:51:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:34,836 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-12 09:51:34,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:51:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-12 09:51:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:51:34,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:34,838 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2020-10-12 09:51:34,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:34,839 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:34,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1731081222, now seen corresponding path program 6 times [2020-10-12 09:51:34,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:34,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637521286] [2020-10-12 09:51:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:39,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:51:39,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 09:51:39,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:51:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:51:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:39,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:39,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:39,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:39,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:39,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:39,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:39,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-12 09:51:39,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637521286] [2020-10-12 09:51:39,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:39,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:51:39,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407092972] [2020-10-12 09:51:39,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:51:39,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:51:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:39,985 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 10 states. [2020-10-12 09:51:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:40,291 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2020-10-12 09:51:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:51:40,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-12 09:51:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:40,293 INFO L225 Difference]: With dead ends: 171 [2020-10-12 09:51:40,293 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:51:40,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:51:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-10-12 09:51:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 09:51:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2020-10-12 09:51:40,304 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 83 [2020-10-12 09:51:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:40,304 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2020-10-12 09:51:40,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:51:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2020-10-12 09:51:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 09:51:40,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:40,306 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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] [2020-10-12 09:51:40,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:40,306 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:40,307 INFO L82 PathProgramCache]: Analyzing trace with hash 724355792, now seen corresponding path program 7 times [2020-10-12 09:51:40,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:40,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612554172] [2020-10-12 09:51:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:40,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:40,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:40,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:40,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:45,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 09:51:45,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:45,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:51:45,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:51:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:51:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:51:45,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:45,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:45,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:45,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:45,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:45,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:45,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:45,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:45,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-12 09:51:45,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612554172] [2020-10-12 09:51:45,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:45,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:51:45,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118161356] [2020-10-12 09:51:45,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:51:45,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:45,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:51:45,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:45,425 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand 11 states. [2020-10-12 09:51:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:45,752 INFO L93 Difference]: Finished difference Result 189 states and 204 transitions. [2020-10-12 09:51:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:51:45,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-10-12 09:51:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:45,754 INFO L225 Difference]: With dead ends: 189 [2020-10-12 09:51:45,754 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 09:51:45,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 09:51:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2020-10-12 09:51:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 09:51:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-12 09:51:45,765 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 93 [2020-10-12 09:51:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:45,765 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-12 09:51:45,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:51:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-12 09:51:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 09:51:45,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:45,767 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2020-10-12 09:51:45,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:51:45,768 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash 190477862, now seen corresponding path program 8 times [2020-10-12 09:51:45,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:45,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505514745] [2020-10-12 09:51:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:45,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:50,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 09:51:50,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:50,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-12 09:51:50,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:50,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:51:50,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 09:51:50,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:51:50,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:50,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:50,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:50,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:50,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:50,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:50,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:50,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-12 09:51:50,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505514745] [2020-10-12 09:51:50,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:50,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:51:50,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778703065] [2020-10-12 09:51:50,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:51:50,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:50,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:51:50,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:51:50,964 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 12 states. [2020-10-12 09:51:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:51,284 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2020-10-12 09:51:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:51:51,285 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2020-10-12 09:51:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:51,287 INFO L225 Difference]: With dead ends: 207 [2020-10-12 09:51:51,287 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 09:51:51,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:51:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 09:51:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-10-12 09:51:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 09:51:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2020-10-12 09:51:51,298 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 103 [2020-10-12 09:51:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:51,298 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2020-10-12 09:51:51,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:51:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2020-10-12 09:51:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 09:51:51,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:51,300 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 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] [2020-10-12 09:51:51,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:51:51,300 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:51,301 INFO L82 PathProgramCache]: Analyzing trace with hash 706031100, now seen corresponding path program 9 times [2020-10-12 09:51:51,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:51,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572963687] [2020-10-12 09:51:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:51,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:51:56,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:56,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:56,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:56,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:56,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:56,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:56,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-12 09:51:56,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572963687] [2020-10-12 09:51:56,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:56,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:51:56,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816818677] [2020-10-12 09:51:56,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:51:56,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:56,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:51:56,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:51:56,499 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand 13 states. [2020-10-12 09:51:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:56,909 INFO L93 Difference]: Finished difference Result 225 states and 240 transitions. [2020-10-12 09:51:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:51:56,909 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 113 [2020-10-12 09:51:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:56,910 INFO L225 Difference]: With dead ends: 225 [2020-10-12 09:51:56,911 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 09:51:56,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:51:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 09:51:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2020-10-12 09:51:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 09:51:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2020-10-12 09:51:56,931 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 113 [2020-10-12 09:51:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:56,934 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2020-10-12 09:51:56,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:51:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2020-10-12 09:51:56,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-12 09:51:56,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:56,936 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2020-10-12 09:51:56,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:51:56,942 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:56,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1465953710, now seen corresponding path program 10 times [2020-10-12 09:51:56,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:56,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715397897] [2020-10-12 09:51:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:56,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:57,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:01,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-12 09:52:01,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:01,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 09:52:01,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:01,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:52:01,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-12 09:52:01,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:52:01,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:02,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:02,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:02,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:02,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:02,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:02,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:02,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:02,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:02,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:02,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-12 09:52:02,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715397897] [2020-10-12 09:52:02,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:02,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:52:02,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852962046] [2020-10-12 09:52:02,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:52:02,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:02,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:52:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:02,131 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand 14 states. [2020-10-12 09:52:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:02,592 INFO L93 Difference]: Finished difference Result 243 states and 258 transitions. [2020-10-12 09:52:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:52:02,593 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-10-12 09:52:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:02,594 INFO L225 Difference]: With dead ends: 243 [2020-10-12 09:52:02,594 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 09:52:02,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:02,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 09:52:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2020-10-12 09:52:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 09:52:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 145 transitions. [2020-10-12 09:52:02,611 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 145 transitions. Word has length 123 [2020-10-12 09:52:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:02,612 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 145 transitions. [2020-10-12 09:52:02,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:52:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 145 transitions. [2020-10-12 09:52:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-12 09:52:02,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:02,622 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 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] [2020-10-12 09:52:02,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:52:02,622 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:02,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1321419560, now seen corresponding path program 11 times [2020-10-12 09:52:02,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:02,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291128081] [2020-10-12 09:52:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:07,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:07,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-12 09:52:07,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:07,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 09:52:07,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:07,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:07,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:52:07,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:07,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:07,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:07,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:07,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:07,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:07,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:07,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:07,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:07,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-12 09:52:07,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291128081] [2020-10-12 09:52:07,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:07,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:07,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128625568] [2020-10-12 09:52:07,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:07,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:07,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:07,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:07,825 INFO L87 Difference]: Start difference. First operand 139 states and 145 transitions. Second operand 15 states. [2020-10-12 09:52:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:08,236 INFO L93 Difference]: Finished difference Result 261 states and 276 transitions. [2020-10-12 09:52:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:08,237 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2020-10-12 09:52:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:08,239 INFO L225 Difference]: With dead ends: 261 [2020-10-12 09:52:08,239 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 09:52:08,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 09:52:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2020-10-12 09:52:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 09:52:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2020-10-12 09:52:08,248 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 133 [2020-10-12 09:52:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:08,248 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2020-10-12 09:52:08,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2020-10-12 09:52:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-12 09:52:08,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:08,250 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 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] [2020-10-12 09:52:08,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:08,250 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:08,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2133630850, now seen corresponding path program 12 times [2020-10-12 09:52:08,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:08,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440725232] [2020-10-12 09:52:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:08,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:13,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-12 09:52:13,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-12 09:52:13,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 09:52:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:13,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:13,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:13,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:13,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:13,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:13,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:13,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:13,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:13,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-12 09:52:13,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440725232] [2020-10-12 09:52:13,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:13,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:13,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739073241] [2020-10-12 09:52:13,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:13,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:13,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:13,482 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2020-10-12 09:52:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:13,874 INFO L93 Difference]: Finished difference Result 279 states and 294 transitions. [2020-10-12 09:52:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:13,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 143 [2020-10-12 09:52:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:13,877 INFO L225 Difference]: With dead ends: 279 [2020-10-12 09:52:13,877 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 09:52:13,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 09:52:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 159. [2020-10-12 09:52:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 09:52:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2020-10-12 09:52:13,886 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 143 [2020-10-12 09:52:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:13,887 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2020-10-12 09:52:13,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2020-10-12 09:52:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 09:52:13,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:13,889 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:13,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:52:13,889 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1247147436, now seen corresponding path program 13 times [2020-10-12 09:52:13,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:13,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360535339] [2020-10-12 09:52:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:13,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:18,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-12 09:52:18,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:18,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-12 09:52:18,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:18,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:18,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-12 09:52:18,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:19,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:19,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:19,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:19,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:19,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:19,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:19,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:19,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:19,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:19,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-12 09:52:19,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360535339] [2020-10-12 09:52:19,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:19,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:19,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582378056] [2020-10-12 09:52:19,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:19,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:19,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:19,202 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand 17 states. [2020-10-12 09:52:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:19,583 INFO L93 Difference]: Finished difference Result 297 states and 312 transitions. [2020-10-12 09:52:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:19,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 153 [2020-10-12 09:52:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:19,585 INFO L225 Difference]: With dead ends: 297 [2020-10-12 09:52:19,586 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 09:52:19,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 09:52:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-10-12 09:52:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 09:52:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2020-10-12 09:52:19,594 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 153 [2020-10-12 09:52:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:19,594 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2020-10-12 09:52:19,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2020-10-12 09:52:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-12 09:52:19,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:19,597 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:19,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:52:19,597 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:19,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1823056042, now seen corresponding path program 14 times [2020-10-12 09:52:19,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:19,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239555301] [2020-10-12 09:52:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:24,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:24,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-12 09:52:24,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:24,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5355 [2020-10-12 09:52:24,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:24,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:24,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:52:24,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:24,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:52:25,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:25,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:25,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:25,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:52:25,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:25,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:25,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:52:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-12 09:52:25,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239555301] [2020-10-12 09:52:25,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:25,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:25,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944100063] [2020-10-12 09:52:25,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:25,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:25,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:25,227 INFO L87 Difference]: Start difference. First operand 169 states and 175 transitions. Second operand 18 states. [2020-10-12 09:52:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:25,684 INFO L93 Difference]: Finished difference Result 315 states and 330 transitions. [2020-10-12 09:52:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:25,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 163 [2020-10-12 09:52:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:25,687 INFO L225 Difference]: With dead ends: 315 [2020-10-12 09:52:25,687 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 09:52:25,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 09:52:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2020-10-12 09:52:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 09:52:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2020-10-12 09:52:25,695 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 163 [2020-10-12 09:52:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:25,696 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2020-10-12 09:52:25,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2020-10-12 09:52:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 09:52:25,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:25,698 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:25,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:25,699 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:25,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:25,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1547926656, now seen corresponding path program 15 times [2020-10-12 09:52:25,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:25,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039211438] [2020-10-12 09:52:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:30,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:30,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-12 09:52:30,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:30,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 09:52:30,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:30,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:30,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 09:52:30,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:30,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:30,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:30,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:30,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:30,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:30,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:30,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:30,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:30,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:30,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:30,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-12 09:52:30,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039211438] [2020-10-12 09:52:30,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:30,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:30,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610649245] [2020-10-12 09:52:30,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:30,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:30,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:30,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:30,972 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand 19 states. [2020-10-12 09:52:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:31,493 INFO L93 Difference]: Finished difference Result 333 states and 348 transitions. [2020-10-12 09:52:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:31,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 173 [2020-10-12 09:52:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:31,495 INFO L225 Difference]: With dead ends: 333 [2020-10-12 09:52:31,496 INFO L226 Difference]: Without dead ends: 194 [2020-10-12 09:52:31,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-12 09:52:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2020-10-12 09:52:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-12 09:52:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2020-10-12 09:52:31,504 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 173 [2020-10-12 09:52:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:31,504 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2020-10-12 09:52:31,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2020-10-12 09:52:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-12 09:52:31,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:31,506 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:31,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:31,507 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash -850062634, now seen corresponding path program 16 times [2020-10-12 09:52:31,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:31,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657925342] [2020-10-12 09:52:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:31,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:36,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:36,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-12 09:52:36,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:36,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 09:52:36,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:36,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:52:36,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:36,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:52:36,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:36,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:36,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:36,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:36,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:36,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:36,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:36,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:36,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:36,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:36,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:36,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-12 09:52:36,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657925342] [2020-10-12 09:52:36,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:36,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:52:36,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998629126] [2020-10-12 09:52:36,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:52:36,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:52:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:36,796 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand 20 states. [2020-10-12 09:52:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:37,337 INFO L93 Difference]: Finished difference Result 351 states and 366 transitions. [2020-10-12 09:52:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:52:37,337 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 183 [2020-10-12 09:52:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:37,339 INFO L225 Difference]: With dead ends: 351 [2020-10-12 09:52:37,339 INFO L226 Difference]: Without dead ends: 204 [2020-10-12 09:52:37,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-12 09:52:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2020-10-12 09:52:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-12 09:52:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 205 transitions. [2020-10-12 09:52:37,348 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 205 transitions. Word has length 183 [2020-10-12 09:52:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:37,349 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 205 transitions. [2020-10-12 09:52:37,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:52:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 205 transitions. [2020-10-12 09:52:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-12 09:52:37,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:37,351 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:37,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:37,351 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1181593260, now seen corresponding path program 17 times [2020-10-12 09:52:37,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:37,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238142984] [2020-10-12 09:52:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:37,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:42,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:42,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-12 09:52:42,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5275 [2020-10-12 09:52:42,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:52:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:52:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:42,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:42,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:42,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:42,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:42,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:42,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:42,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-12 09:52:42,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238142984] [2020-10-12 09:52:42,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:42,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:52:42,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122355114] [2020-10-12 09:52:42,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:52:42,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:42,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:52:42,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:42,916 INFO L87 Difference]: Start difference. First operand 199 states and 205 transitions. Second operand 21 states. [2020-10-12 09:52:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:43,392 INFO L93 Difference]: Finished difference Result 369 states and 384 transitions. [2020-10-12 09:52:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:52:43,392 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 193 [2020-10-12 09:52:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:43,394 INFO L225 Difference]: With dead ends: 369 [2020-10-12 09:52:43,394 INFO L226 Difference]: Without dead ends: 214 [2020-10-12 09:52:43,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-12 09:52:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2020-10-12 09:52:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-12 09:52:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 215 transitions. [2020-10-12 09:52:43,404 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 215 transitions. Word has length 193 [2020-10-12 09:52:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:43,404 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 215 transitions. [2020-10-12 09:52:43,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:52:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 215 transitions. [2020-10-12 09:52:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-12 09:52:43,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:43,406 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:43,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:52:43,406 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1284028162, now seen corresponding path program 18 times [2020-10-12 09:52:43,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:43,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67198184] [2020-10-12 09:52:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:43,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:48,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:48,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-12 09:52:48,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:48,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-12 09:52:48,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:52:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:52:48,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:48,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:48,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:48,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:48,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:48,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:48,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-12 09:52:48,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67198184] [2020-10-12 09:52:48,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:48,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:52:48,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793819882] [2020-10-12 09:52:48,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:52:48,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:48,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:52:48,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:52:48,783 INFO L87 Difference]: Start difference. First operand 209 states and 215 transitions. Second operand 22 states. [2020-10-12 09:52:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:49,375 INFO L93 Difference]: Finished difference Result 387 states and 402 transitions. [2020-10-12 09:52:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:52:49,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 203 [2020-10-12 09:52:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:49,378 INFO L225 Difference]: With dead ends: 387 [2020-10-12 09:52:49,378 INFO L226 Difference]: Without dead ends: 224 [2020-10-12 09:52:49,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:52:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-12 09:52:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2020-10-12 09:52:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-12 09:52:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 225 transitions. [2020-10-12 09:52:49,388 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 225 transitions. Word has length 203 [2020-10-12 09:52:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:49,389 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 225 transitions. [2020-10-12 09:52:49,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:52:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 225 transitions. [2020-10-12 09:52:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-12 09:52:49,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:49,390 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:49,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:52:49,391 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:49,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1940949976, now seen corresponding path program 19 times [2020-10-12 09:52:49,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:49,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953144027] [2020-10-12 09:52:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:54,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:54,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-12 09:52:54,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:54,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5155 [2020-10-12 09:52:54,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:54,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:52:54,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 09:52:54,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:52:54,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:54,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:54,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:54,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:54,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:54,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:54,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:54,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:54,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:54,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-12 09:52:54,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953144027] [2020-10-12 09:52:54,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:54,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:52:54,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472048406] [2020-10-12 09:52:54,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:52:54,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:52:54,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:52:54,894 INFO L87 Difference]: Start difference. First operand 219 states and 225 transitions. Second operand 23 states. [2020-10-12 09:52:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:55,504 INFO L93 Difference]: Finished difference Result 405 states and 420 transitions. [2020-10-12 09:52:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:52:55,504 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 213 [2020-10-12 09:52:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:55,506 INFO L225 Difference]: With dead ends: 405 [2020-10-12 09:52:55,507 INFO L226 Difference]: Without dead ends: 234 [2020-10-12 09:52:55,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:52:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-12 09:52:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2020-10-12 09:52:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-12 09:52:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 235 transitions. [2020-10-12 09:52:55,517 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 235 transitions. Word has length 213 [2020-10-12 09:52:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:55,517 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 235 transitions. [2020-10-12 09:52:55,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:52:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 235 transitions. [2020-10-12 09:52:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-12 09:52:55,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:55,519 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:55,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:52:55,520 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1669886674, now seen corresponding path program 20 times [2020-10-12 09:52:55,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:55,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517430213] [2020-10-12 09:52:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:55,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:00,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-12 09:53:00,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:00,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5406 [2020-10-12 09:53:00,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-12 09:53:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:00,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:01,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:01,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:01,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:01,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:01,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:01,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:01,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:01,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:01,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:01,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-12 09:53:01,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517430213] [2020-10-12 09:53:01,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:01,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:01,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953546474] [2020-10-12 09:53:01,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:01,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:01,311 INFO L87 Difference]: Start difference. First operand 229 states and 235 transitions. Second operand 24 states. [2020-10-12 09:53:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:01,987 INFO L93 Difference]: Finished difference Result 423 states and 438 transitions. [2020-10-12 09:53:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:01,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 223 [2020-10-12 09:53:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:01,989 INFO L225 Difference]: With dead ends: 423 [2020-10-12 09:53:01,989 INFO L226 Difference]: Without dead ends: 244 [2020-10-12 09:53:01,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:01,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-12 09:53:01,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 239. [2020-10-12 09:53:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-12 09:53:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 245 transitions. [2020-10-12 09:53:02,000 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 245 transitions. Word has length 223 [2020-10-12 09:53:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:02,000 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 245 transitions. [2020-10-12 09:53:02,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 245 transitions. [2020-10-12 09:53:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-12 09:53:02,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:02,002 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:02,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:53:02,004 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1777867524, now seen corresponding path program 21 times [2020-10-12 09:53:02,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:02,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706363115] [2020-10-12 09:53:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:02,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:07,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-12 09:53:07,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:53:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:07,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:07,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:07,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:07,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:07,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:07,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:07,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:07,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:07,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:07,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:07,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:07,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-12 09:53:07,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706363115] [2020-10-12 09:53:07,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:07,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:53:07,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878467535] [2020-10-12 09:53:07,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:53:07,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:53:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:07,437 INFO L87 Difference]: Start difference. First operand 239 states and 245 transitions. Second operand 25 states. [2020-10-12 09:53:08,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:08,123 INFO L93 Difference]: Finished difference Result 441 states and 456 transitions. [2020-10-12 09:53:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:53:08,124 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 233 [2020-10-12 09:53:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:08,126 INFO L225 Difference]: With dead ends: 441 [2020-10-12 09:53:08,126 INFO L226 Difference]: Without dead ends: 254 [2020-10-12 09:53:08,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-12 09:53:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 249. [2020-10-12 09:53:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 09:53:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 255 transitions. [2020-10-12 09:53:08,141 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 255 transitions. Word has length 233 [2020-10-12 09:53:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:08,141 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 255 transitions. [2020-10-12 09:53:08,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:53:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 255 transitions. [2020-10-12 09:53:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-12 09:53:08,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:08,143 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:08,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:53:08,143 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash 936678746, now seen corresponding path program 22 times [2020-10-12 09:53:08,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:08,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369276531] [2020-10-12 09:53:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:13,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-12 09:53:13,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:13,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5644 [2020-10-12 09:53:13,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:13,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:13,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-12 09:53:13,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:13,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:14,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:14,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:14,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:14,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:14,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:14,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:14,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:14,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:14,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-10-12 09:53:14,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369276531] [2020-10-12 09:53:14,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:14,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:14,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726255972] [2020-10-12 09:53:14,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:14,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:14,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:14,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:14,429 INFO L87 Difference]: Start difference. First operand 249 states and 255 transitions. Second operand 26 states. [2020-10-12 09:53:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:15,138 INFO L93 Difference]: Finished difference Result 459 states and 474 transitions. [2020-10-12 09:53:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:15,138 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 243 [2020-10-12 09:53:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:15,140 INFO L225 Difference]: With dead ends: 459 [2020-10-12 09:53:15,141 INFO L226 Difference]: Without dead ends: 264 [2020-10-12 09:53:15,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-12 09:53:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2020-10-12 09:53:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 09:53:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 265 transitions. [2020-10-12 09:53:15,150 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 265 transitions. Word has length 243 [2020-10-12 09:53:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:15,150 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 265 transitions. [2020-10-12 09:53:15,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 265 transitions. [2020-10-12 09:53:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-12 09:53:15,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:15,153 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:15,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:53:15,153 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1875420112, now seen corresponding path program 23 times [2020-10-12 09:53:15,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:15,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055828343] [2020-10-12 09:53:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:15,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:15,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:15,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:20,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-12 09:53:20,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:20,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5296 [2020-10-12 09:53:20,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:53:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:20,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:20,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:20,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:20,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:20,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:20,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:20,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:20,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2645 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-10-12 09:53:20,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055828343] [2020-10-12 09:53:20,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:20,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:20,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084438970] [2020-10-12 09:53:20,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:20,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:20,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:20,942 INFO L87 Difference]: Start difference. First operand 259 states and 265 transitions. Second operand 27 states. [2020-10-12 09:53:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:21,678 INFO L93 Difference]: Finished difference Result 477 states and 492 transitions. [2020-10-12 09:53:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:21,679 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 253 [2020-10-12 09:53:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:21,683 INFO L225 Difference]: With dead ends: 477 [2020-10-12 09:53:21,683 INFO L226 Difference]: Without dead ends: 274 [2020-10-12 09:53:21,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-12 09:53:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 269. [2020-10-12 09:53:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-12 09:53:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 275 transitions. [2020-10-12 09:53:21,692 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 275 transitions. Word has length 253 [2020-10-12 09:53:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:21,692 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 275 transitions. [2020-10-12 09:53:21,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 275 transitions. [2020-10-12 09:53:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-12 09:53:21,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:21,694 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:21,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:53:21,695 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash 567463814, now seen corresponding path program 24 times [2020-10-12 09:53:21,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:21,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834381464] [2020-10-12 09:53:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:27,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-12 09:53:27,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:27,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5527 [2020-10-12 09:53:27,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:27,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:27,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-12 09:53:27,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:27,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:27,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:27,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:27,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:27,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:53:27,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:27,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:27,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:27,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:27,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2020-10-12 09:53:27,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834381464] [2020-10-12 09:53:27,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:27,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:27,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430765249] [2020-10-12 09:53:27,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:27,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:27,831 INFO L87 Difference]: Start difference. First operand 269 states and 275 transitions. Second operand 28 states. [2020-10-12 09:53:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:28,603 INFO L93 Difference]: Finished difference Result 495 states and 510 transitions. [2020-10-12 09:53:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:28,604 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 263 [2020-10-12 09:53:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:28,606 INFO L225 Difference]: With dead ends: 495 [2020-10-12 09:53:28,606 INFO L226 Difference]: Without dead ends: 284 [2020-10-12 09:53:28,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-12 09:53:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 279. [2020-10-12 09:53:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-12 09:53:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 285 transitions. [2020-10-12 09:53:28,615 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 285 transitions. Word has length 263 [2020-10-12 09:53:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:28,615 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 285 transitions. [2020-10-12 09:53:28,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 285 transitions. [2020-10-12 09:53:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-12 09:53:28,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:28,617 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:28,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:53:28,618 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash 903958364, now seen corresponding path program 25 times [2020-10-12 09:53:28,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:28,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519236126] [2020-10-12 09:53:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:28,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:28,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:28,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:33,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:33,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-12 09:53:33,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:33,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-12 09:53:33,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:53:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 09:53:33,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:53:33,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:34,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:34,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:34,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:34,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:34,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:53:34,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:34,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3125 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2020-10-12 09:53:34,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519236126] [2020-10-12 09:53:34,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:34,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:53:34,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725158055] [2020-10-12 09:53:34,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:53:34,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:53:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:34,375 INFO L87 Difference]: Start difference. First operand 279 states and 285 transitions. Second operand 29 states. [2020-10-12 09:53:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:35,121 INFO L93 Difference]: Finished difference Result 513 states and 528 transitions. [2020-10-12 09:53:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:53:35,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 273 [2020-10-12 09:53:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:35,123 INFO L225 Difference]: With dead ends: 513 [2020-10-12 09:53:35,123 INFO L226 Difference]: Without dead ends: 294 [2020-10-12 09:53:35,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-12 09:53:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 289. [2020-10-12 09:53:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-12 09:53:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 295 transitions. [2020-10-12 09:53:35,134 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 295 transitions. Word has length 273 [2020-10-12 09:53:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:35,134 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 295 transitions. [2020-10-12 09:53:35,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:53:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 295 transitions. [2020-10-12 09:53:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-12 09:53:35,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:35,137 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:35,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:53:35,137 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1507509326, now seen corresponding path program 26 times [2020-10-12 09:53:35,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:35,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241485072] [2020-10-12 09:53:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:35,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:40,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-12 09:53:40,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:40,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5654 [2020-10-12 09:53:40,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:40,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:53:40,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:53:40,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:53:40,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:41,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:41,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:41,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:41,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:41,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:41,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:41,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3380 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2020-10-12 09:53:41,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241485072] [2020-10-12 09:53:41,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:41,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:53:41,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127819316] [2020-10-12 09:53:41,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:53:41,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:53:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:41,371 INFO L87 Difference]: Start difference. First operand 289 states and 295 transitions. Second operand 30 states. [2020-10-12 09:53:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:42,213 INFO L93 Difference]: Finished difference Result 531 states and 546 transitions. [2020-10-12 09:53:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:53:42,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 283 [2020-10-12 09:53:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:42,219 INFO L225 Difference]: With dead ends: 531 [2020-10-12 09:53:42,219 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 09:53:42,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 09:53:42,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 299. [2020-10-12 09:53:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-12 09:53:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 305 transitions. [2020-10-12 09:53:42,229 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 305 transitions. Word has length 283 [2020-10-12 09:53:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:42,229 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 305 transitions. [2020-10-12 09:53:42,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:53:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 305 transitions. [2020-10-12 09:53:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-12 09:53:42,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:42,232 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:42,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:53:42,232 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:42,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1390998664, now seen corresponding path program 27 times [2020-10-12 09:53:42,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:42,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315386094] [2020-10-12 09:53:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:42,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:42,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:42,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:47,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-12 09:53:47,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:47,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5155 [2020-10-12 09:53:47,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:47,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:53:47,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-12 09:53:47,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:53:47,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:47,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:47,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:47,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:47,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:47,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:47,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:47,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3645 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2020-10-12 09:53:48,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315386094] [2020-10-12 09:53:48,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:48,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:53:48,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937614833] [2020-10-12 09:53:48,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:53:48,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:48,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:53:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:53:48,004 INFO L87 Difference]: Start difference. First operand 299 states and 305 transitions. Second operand 31 states. [2020-10-12 09:53:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:48,870 INFO L93 Difference]: Finished difference Result 549 states and 564 transitions. [2020-10-12 09:53:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:53:48,871 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 293 [2020-10-12 09:53:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:48,874 INFO L225 Difference]: With dead ends: 549 [2020-10-12 09:53:48,874 INFO L226 Difference]: Without dead ends: 314 [2020-10-12 09:53:48,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:53:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-12 09:53:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 309. [2020-10-12 09:53:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-12 09:53:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 315 transitions. [2020-10-12 09:53:48,883 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 315 transitions. Word has length 293 [2020-10-12 09:53:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:48,884 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 315 transitions. [2020-10-12 09:53:48,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:53:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 315 transitions. [2020-10-12 09:53:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-12 09:53:48,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:48,886 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:48,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:53:48,886 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:48,887 INFO L82 PathProgramCache]: Analyzing trace with hash 419355102, now seen corresponding path program 28 times [2020-10-12 09:53:48,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:48,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551850945] [2020-10-12 09:53:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:48,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:49,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:49,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:54,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-12 09:53:54,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:54,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5245 [2020-10-12 09:53:54,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:54,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:53:54,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:54,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:53:54,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:54,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:54,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:54,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:54,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:54,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:54,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:54,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:54,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:54,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:54,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3920 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2020-10-12 09:53:54,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551850945] [2020-10-12 09:53:54,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:54,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:53:54,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008768419] [2020-10-12 09:53:54,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:53:54,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:54,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:53:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:53:54,784 INFO L87 Difference]: Start difference. First operand 309 states and 315 transitions. Second operand 32 states. [2020-10-12 09:53:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:55,739 INFO L93 Difference]: Finished difference Result 567 states and 582 transitions. [2020-10-12 09:53:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:53:55,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 303 [2020-10-12 09:53:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:55,742 INFO L225 Difference]: With dead ends: 567 [2020-10-12 09:53:55,744 INFO L226 Difference]: Without dead ends: 324 [2020-10-12 09:53:55,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:53:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-12 09:53:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 319. [2020-10-12 09:53:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-12 09:53:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 325 transitions. [2020-10-12 09:53:55,752 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 325 transitions. Word has length 303 [2020-10-12 09:53:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:55,753 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 325 transitions. [2020-10-12 09:53:55,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:53:55,753 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 325 transitions. [2020-10-12 09:53:55,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-12 09:53:55,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:55,755 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:55,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:53:55,755 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1203850164, now seen corresponding path program 29 times [2020-10-12 09:53:55,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:55,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411179634] [2020-10-12 09:53:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:55,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:55,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:55,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:55,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:01,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-12 09:54:01,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:01,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5361 [2020-10-12 09:54:01,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-12 09:54:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:01,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:01,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:01,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:01,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:01,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:01,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:01,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:01,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:01,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:01,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:01,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4205 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2020-10-12 09:54:01,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411179634] [2020-10-12 09:54:01,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:01,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:54:01,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654827439] [2020-10-12 09:54:01,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:54:01,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:54:01,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:01,823 INFO L87 Difference]: Start difference. First operand 319 states and 325 transitions. Second operand 33 states. [2020-10-12 09:54:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:02,645 INFO L93 Difference]: Finished difference Result 585 states and 600 transitions. [2020-10-12 09:54:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:54:02,647 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 313 [2020-10-12 09:54:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:02,649 INFO L225 Difference]: With dead ends: 585 [2020-10-12 09:54:02,649 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 09:54:02,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 09:54:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 329. [2020-10-12 09:54:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-12 09:54:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 335 transitions. [2020-10-12 09:54:02,658 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 335 transitions. Word has length 313 [2020-10-12 09:54:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:02,659 INFO L479 AbstractCegarLoop]: Abstraction has 329 states and 335 transitions. [2020-10-12 09:54:02,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:54:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 335 transitions. [2020-10-12 09:54:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-12 09:54:02,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:02,661 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:02,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:54:02,662 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1760384502, now seen corresponding path program 30 times [2020-10-12 09:54:02,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:02,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982653984] [2020-10-12 09:54:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:02,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:02,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:02,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:08,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-12 09:54:08,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:08,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5489 [2020-10-12 09:54:08,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:54:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 09:54:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:54:08,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:08,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:08,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:08,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:08,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:08,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:08,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:08,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:08,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4500 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2020-10-12 09:54:08,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982653984] [2020-10-12 09:54:08,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:08,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:54:08,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784415092] [2020-10-12 09:54:08,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:54:08,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:08,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:54:08,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:08,875 INFO L87 Difference]: Start difference. First operand 329 states and 335 transitions. Second operand 34 states. [2020-10-12 09:54:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:09,705 INFO L93 Difference]: Finished difference Result 603 states and 618 transitions. [2020-10-12 09:54:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:54:09,710 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 323 [2020-10-12 09:54:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:09,711 INFO L225 Difference]: With dead ends: 603 [2020-10-12 09:54:09,711 INFO L226 Difference]: Without dead ends: 344 [2020-10-12 09:54:09,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-12 09:54:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 339. [2020-10-12 09:54:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-12 09:54:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 345 transitions. [2020-10-12 09:54:09,719 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 345 transitions. Word has length 323 [2020-10-12 09:54:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:09,720 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 345 transitions. [2020-10-12 09:54:09,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:54:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 345 transitions. [2020-10-12 09:54:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-12 09:54:09,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:09,722 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:09,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:54:09,723 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1654827808, now seen corresponding path program 31 times [2020-10-12 09:54:09,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:09,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591283664] [2020-10-12 09:54:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:09,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:15,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-12 09:54:15,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:15,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6048 [2020-10-12 09:54:15,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:15,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:15,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:15,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:15,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:16,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:16,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:16,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:16,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:16,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:16,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:16,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:16,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:16,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:16,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:16,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2020-10-12 09:54:16,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591283664] [2020-10-12 09:54:16,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:16,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:16,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649452526] [2020-10-12 09:54:16,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:16,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:16,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:16,547 INFO L87 Difference]: Start difference. First operand 339 states and 345 transitions. Second operand 35 states. [2020-10-12 09:54:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:17,625 INFO L93 Difference]: Finished difference Result 621 states and 636 transitions. [2020-10-12 09:54:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:17,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 333 [2020-10-12 09:54:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:17,628 INFO L225 Difference]: With dead ends: 621 [2020-10-12 09:54:17,628 INFO L226 Difference]: Without dead ends: 354 [2020-10-12 09:54:17,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-12 09:54:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 349. [2020-10-12 09:54:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-12 09:54:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 355 transitions. [2020-10-12 09:54:17,639 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 355 transitions. Word has length 333 [2020-10-12 09:54:17,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:17,639 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 355 transitions. [2020-10-12 09:54:17,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:17,639 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 355 transitions. [2020-10-12 09:54:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-10-12 09:54:17,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:17,644 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:17,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:54:17,645 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash -980177866, now seen corresponding path program 32 times [2020-10-12 09:54:17,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:17,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000536679] [2020-10-12 09:54:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:17,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:17,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:17,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:17,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:24,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:24,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-12 09:54:24,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:24,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6326 [2020-10-12 09:54:24,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:24,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:54:24,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-12 09:54:24,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:54:24,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:24,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:24,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:24,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:24,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:24,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:24,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:24,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5120 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2020-10-12 09:54:24,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000536679] [2020-10-12 09:54:24,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:24,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:54:24,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999560170] [2020-10-12 09:54:24,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:54:24,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:24,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:54:24,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:24,863 INFO L87 Difference]: Start difference. First operand 349 states and 355 transitions. Second operand 36 states. [2020-10-12 09:54:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:25,892 INFO L93 Difference]: Finished difference Result 639 states and 654 transitions. [2020-10-12 09:54:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:54:25,892 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 343 [2020-10-12 09:54:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:25,895 INFO L225 Difference]: With dead ends: 639 [2020-10-12 09:54:25,895 INFO L226 Difference]: Without dead ends: 364 [2020-10-12 09:54:25,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-12 09:54:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 359. [2020-10-12 09:54:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-12 09:54:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 365 transitions. [2020-10-12 09:54:25,903 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 365 transitions. Word has length 343 [2020-10-12 09:54:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:25,904 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 365 transitions. [2020-10-12 09:54:25,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:54:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 365 transitions. [2020-10-12 09:54:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-12 09:54:25,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:25,906 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:25,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:54:25,907 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash -986705908, now seen corresponding path program 33 times [2020-10-12 09:54:25,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:25,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925615578] [2020-10-12 09:54:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:25,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:26,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:26,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:31,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:31,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-12 09:54:31,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:31,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5323 [2020-10-12 09:54:31,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:31,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:54:31,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-12 09:54:31,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:54:31,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:32,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:32,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:32,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:32,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:32,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:32,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:32,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5445 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 4356 trivial. 0 not checked. [2020-10-12 09:54:32,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925615578] [2020-10-12 09:54:32,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:32,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:54:32,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091893184] [2020-10-12 09:54:32,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:54:32,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:54:32,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:32,112 INFO L87 Difference]: Start difference. First operand 359 states and 365 transitions. Second operand 37 states. [2020-10-12 09:54:33,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:33,207 INFO L93 Difference]: Finished difference Result 657 states and 672 transitions. [2020-10-12 09:54:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:54:33,208 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 353 [2020-10-12 09:54:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:33,211 INFO L225 Difference]: With dead ends: 657 [2020-10-12 09:54:33,211 INFO L226 Difference]: Without dead ends: 374 [2020-10-12 09:54:33,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-12 09:54:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 369. [2020-10-12 09:54:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-12 09:54:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 375 transitions. [2020-10-12 09:54:33,220 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 375 transitions. Word has length 353 [2020-10-12 09:54:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:33,220 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 375 transitions. [2020-10-12 09:54:33,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:54:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 375 transitions. [2020-10-12 09:54:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-12 09:54:33,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:33,223 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:33,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:54:33,223 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1842028446, now seen corresponding path program 34 times [2020-10-12 09:54:33,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:33,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507854611] [2020-10-12 09:54:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:33,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:33,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:33,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:33,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:39,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:39,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 371 [2020-10-12 09:54:39,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:39,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6036 [2020-10-12 09:54:39,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:54:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-12 09:54:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:54:39,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:40,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:40,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:40,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:40,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:40,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5780 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2020-10-12 09:54:40,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507854611] [2020-10-12 09:54:40,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:40,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:54:40,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708839289] [2020-10-12 09:54:40,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:54:40,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:54:40,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:40,192 INFO L87 Difference]: Start difference. First operand 369 states and 375 transitions. Second operand 38 states. [2020-10-12 09:54:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:41,180 INFO L93 Difference]: Finished difference Result 675 states and 690 transitions. [2020-10-12 09:54:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:54:41,181 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 363 [2020-10-12 09:54:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:41,185 INFO L225 Difference]: With dead ends: 675 [2020-10-12 09:54:41,185 INFO L226 Difference]: Without dead ends: 384 [2020-10-12 09:54:41,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-12 09:54:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 379. [2020-10-12 09:54:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-12 09:54:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 385 transitions. [2020-10-12 09:54:41,194 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 385 transitions. Word has length 363 [2020-10-12 09:54:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:41,195 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 385 transitions. [2020-10-12 09:54:41,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:54:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 385 transitions. [2020-10-12 09:54:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-12 09:54:41,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:41,198 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:41,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:54:41,198 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:41,198 INFO L82 PathProgramCache]: Analyzing trace with hash -651395784, now seen corresponding path program 35 times [2020-10-12 09:54:41,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:41,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416207683] [2020-10-12 09:54:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:41,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:47,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:47,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-12 09:54:47,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5880 [2020-10-12 09:54:47,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:54:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-12 09:54:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 09:54:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:48,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:48,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:48,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:48,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:48,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:48,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:48,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-10-12 09:54:48,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416207683] [2020-10-12 09:54:48,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:48,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:54:48,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436254434] [2020-10-12 09:54:48,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:54:48,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:48,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:54:48,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:54:48,064 INFO L87 Difference]: Start difference. First operand 379 states and 385 transitions. Second operand 39 states. [2020-10-12 09:54:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:49,268 INFO L93 Difference]: Finished difference Result 693 states and 708 transitions. [2020-10-12 09:54:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:54:49,269 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 373 [2020-10-12 09:54:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:49,271 INFO L225 Difference]: With dead ends: 693 [2020-10-12 09:54:49,272 INFO L226 Difference]: Without dead ends: 394 [2020-10-12 09:54:49,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:54:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-12 09:54:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 389. [2020-10-12 09:54:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-12 09:54:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 395 transitions. [2020-10-12 09:54:49,280 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 395 transitions. Word has length 373 [2020-10-12 09:54:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:49,281 INFO L479 AbstractCegarLoop]: Abstraction has 389 states and 395 transitions. [2020-10-12 09:54:49,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:54:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 395 transitions. [2020-10-12 09:54:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-10-12 09:54:49,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:49,284 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:49,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:54:49,284 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash -215398770, now seen corresponding path program 36 times [2020-10-12 09:54:49,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:49,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777006058] [2020-10-12 09:54:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:49,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:49,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:49,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:49,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:54,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 391 [2020-10-12 09:54:54,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:54,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5265 [2020-10-12 09:54:54,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:54:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-12 09:54:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 09:54:54,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:55,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:55,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:55,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:55,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:55,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:55,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:55,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5184 trivial. 0 not checked. [2020-10-12 09:54:55,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777006058] [2020-10-12 09:54:55,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:55,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:54:55,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703837621] [2020-10-12 09:54:55,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:54:55,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:54:55,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:54:55,595 INFO L87 Difference]: Start difference. First operand 389 states and 395 transitions. Second operand 40 states. [2020-10-12 09:54:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:56,705 INFO L93 Difference]: Finished difference Result 711 states and 726 transitions. [2020-10-12 09:54:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:54:56,706 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 383 [2020-10-12 09:54:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:56,708 INFO L225 Difference]: With dead ends: 711 [2020-10-12 09:54:56,709 INFO L226 Difference]: Without dead ends: 404 [2020-10-12 09:54:56,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:54:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-12 09:54:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2020-10-12 09:54:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-12 09:54:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 405 transitions. [2020-10-12 09:54:56,716 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 405 transitions. Word has length 383 [2020-10-12 09:54:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:56,717 INFO L479 AbstractCegarLoop]: Abstraction has 399 states and 405 transitions. [2020-10-12 09:54:56,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:54:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 405 transitions. [2020-10-12 09:54:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-12 09:54:56,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:56,720 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:56,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:54:56,720 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:56,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:56,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1539677284, now seen corresponding path program 37 times [2020-10-12 09:54:56,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:56,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658873778] [2020-10-12 09:54:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:56,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking...