/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:38:36,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:38:36,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:38:36,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:38:36,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:38:36,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:38:36,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:38:36,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:38:36,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:38:36,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:38:36,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:38:36,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:38:36,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:38:36,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:38:36,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:38:36,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:38:36,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:38:36,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:38:36,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:38:36,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:38:36,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:38:36,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:38:36,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:38:36,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:38:36,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:38:36,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:38:36,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:38:36,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:38:36,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:38:36,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:38:36,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:38:36,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:38:36,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:38:36,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:38:36,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:38:36,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:38:36,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:38:36,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:38:36,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:38:36,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:38:36,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:38:36,244 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 [2020-10-13 23:38:36,267 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:38:36,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:38:36,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:38:36,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:38:36,269 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:38:36,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:38:36,270 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:38:36,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:38:36,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:38:36,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:38:36,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:38:36,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:38:36,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:38:36,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:38:36,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:38:36,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:38:36,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:38:36,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:38:36,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:38:36,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:38:36,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:38:36,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:38:36,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:38:36,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:38:36,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:38:36,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:38:36,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:38:36,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:38:36,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:38:36,274 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:38:36,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:38:36,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:38:36,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:38:36,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:38:36,634 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:38:36,635 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2020-10-13 23:38:36,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed96bbbb5/46347e6ccdae49fcb154216a3ac55f18/FLAG1e7f9ef68 [2020-10-13 23:38:37,141 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:38:37,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2020-10-13 23:38:37,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed96bbbb5/46347e6ccdae49fcb154216a3ac55f18/FLAG1e7f9ef68 [2020-10-13 23:38:37,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed96bbbb5/46347e6ccdae49fcb154216a3ac55f18 [2020-10-13 23:38:37,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:38:37,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:38:37,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:37,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:38:37,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:38:37,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:37,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b5b388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37, skipping insertion in model container [2020-10-13 23:38:37,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:37,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:38:37,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:38:37,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:37,819 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:38:37,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:37,869 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:38:37,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37 WrapperNode [2020-10-13 23:38:37,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:37,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:38:37,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:38:37,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:38:37,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:37,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:37,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:37,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:37,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:38,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:38,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (1/1) ... [2020-10-13 23:38:38,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:38:38,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:38:38,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:38:38,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:38:38,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (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 [2020-10-13 23:38:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:38:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:38:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:38:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:38:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:38:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:38:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:38:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:38:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:38:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:38:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:38:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:38:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:38:38,351 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:38:38,352 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-13 23:38:38,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:38 BoogieIcfgContainer [2020-10-13 23:38:38,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:38:38,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:38:38,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:38:38,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:38:38,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:38:37" (1/3) ... [2020-10-13 23:38:38,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66394a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:38, skipping insertion in model container [2020-10-13 23:38:38,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:37" (2/3) ... [2020-10-13 23:38:38,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66394a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:38, skipping insertion in model container [2020-10-13 23:38:38,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:38" (3/3) ... [2020-10-13 23:38:38,366 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2020-10-13 23:38:38,378 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:38:38,386 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:38:38,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:38:38,443 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:38:38,443 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:38:38,443 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:38:38,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:38:38,444 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:38:38,444 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:38:38,444 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:38:38,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:38:38,472 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-13 23:38:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:38:38,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:38,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:38,482 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2020-10-13 23:38:38,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:38,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357489917] [2020-10-13 23:38:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:38,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:41,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:41,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:38:41,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:38:41,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3054 [2020-10-13 23:38:41,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:41,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:41,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:41,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:38:41,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:41,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:38:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:41,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:41,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:41,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:41,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:41,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:38:41,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:41,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:41,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:41,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:41,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:41,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357489917] [2020-10-13 23:38:41,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:41,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:38:41,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389726720] [2020-10-13 23:38:41,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:38:41,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:41,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:38:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:41,853 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-13 23:38:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:42,041 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2020-10-13 23:38:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:38:42,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 23:38:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:42,054 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:38:42,055 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:38:42,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:38:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:38:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:38:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-10-13 23:38:42,101 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 29 [2020-10-13 23:38:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:42,102 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-10-13 23:38:42,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:38:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-10-13 23:38:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:38:42,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:42,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:42,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:38:42,104 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1932733742, now seen corresponding path program 1 times [2020-10-13 23:38:42,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:42,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350863645] [2020-10-13 23:38:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:42,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:47,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:38:47,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:38:47,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:38:47,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:47,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:38:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:47,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:38:47,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:38:47,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:47,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:47,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:47,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:47,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:47,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:47,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:47,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:47,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350863645] [2020-10-13 23:38:47,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:47,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:38:47,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477581357] [2020-10-13 23:38:47,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:38:47,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:38:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:47,227 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2020-10-13 23:38:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:47,423 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-10-13 23:38:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:38:47,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 23:38:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:47,426 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:38:47,427 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:38:47,429 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 [2020-10-13 23:38:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:38:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 23:38:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:38:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-13 23:38:47,446 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-10-13 23:38:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:47,447 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-13 23:38:47,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:38:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-13 23:38:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:38:47,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:47,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:47,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:38:47,449 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2020-10-13 23:38:47,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:47,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235049733] [2020-10-13 23:38:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:47,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:52,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:38:52,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:38:52,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:38:52,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:52,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:52,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:38:52,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:38:52,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:38:52,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:52,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:52,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:52,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:52,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:52,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:52,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:52,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:52,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:52,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:52,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:52,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:38:52,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235049733] [2020-10-13 23:38:52,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:52,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:38:52,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851799270] [2020-10-13 23:38:52,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:38:52,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:38:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:52,526 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 5 states. [2020-10-13 23:38:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:52,719 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-10-13 23:38:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:38:52,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-13 23:38:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:52,721 INFO L225 Difference]: With dead ends: 87 [2020-10-13 23:38:52,721 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:38:52,722 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 [2020-10-13 23:38:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:38:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 23:38:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:38:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-13 23:38:52,742 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-10-13 23:38:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:52,743 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-13 23:38:52,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:38:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-13 23:38:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:38:52,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:52,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:52,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:38:52,748 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2020-10-13 23:38:52,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:52,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326184417] [2020-10-13 23:38:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:52,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:38:57,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:38:57,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:38:57,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:38:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:38:57,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:57,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:57,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:57,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:57,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:57,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:57,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:57,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 23:38:57,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326184417] [2020-10-13 23:38:57,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:57,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:38:57,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001042615] [2020-10-13 23:38:57,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:38:57,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:57,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:38:57,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:38:57,840 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2020-10-13 23:38:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:58,027 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-10-13 23:38:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:38:58,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-13 23:38:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:58,029 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:38:58,029 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:38:58,030 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 [2020-10-13 23:38:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:38:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 23:38:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:38:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-13 23:38:58,040 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2020-10-13 23:38:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:58,040 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-13 23:38:58,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:38:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-13 23:38:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:38:58,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:58,042 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:58,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:38:58,043 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:58,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:58,043 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2020-10-13 23:38:58,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:58,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49251253] [2020-10-13 23:38:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:58,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:58,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:03,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:39:03,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:03,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:39:03,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:03,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:03,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:39:03,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:39:03,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:39:03,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:03,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:03,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:03,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:03,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:03,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:03,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:03,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:03,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 23:39:03,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49251253] [2020-10-13 23:39:03,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:03,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:39:03,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771677267] [2020-10-13 23:39:03,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:39:03,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:39:03,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:39:03,127 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2020-10-13 23:39:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:03,315 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2020-10-13 23:39:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:39:03,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-13 23:39:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:03,317 INFO L225 Difference]: With dead ends: 121 [2020-10-13 23:39:03,317 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:39:03,318 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 [2020-10-13 23:39:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:39:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 23:39:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:39:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-13 23:39:03,327 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2020-10-13 23:39:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:03,328 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-13 23:39:03,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:39:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-13 23:39:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:39:03,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:03,329 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:03,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:39:03,330 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:03,330 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2020-10-13 23:39:03,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:03,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996228102] [2020-10-13 23:39:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:05,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:08,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:39:08,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:08,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:39:08,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:08,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:39:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:39:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:39:08,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:08,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:08,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:08,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:08,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:39:08,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:08,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:08,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:08,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 23:39:08,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996228102] [2020-10-13 23:39:08,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:08,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:39:08,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113919226] [2020-10-13 23:39:08,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:39:08,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:08,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:39:08,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:39:08,435 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2020-10-13 23:39:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:08,662 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-10-13 23:39:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:39:08,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-13 23:39:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:08,664 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:39:08,664 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:39:08,667 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 [2020-10-13 23:39:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:39:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 23:39:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:39:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-13 23:39:08,684 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2020-10-13 23:39:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:08,684 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-13 23:39:08,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:39:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-13 23:39:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:39:08,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:08,686 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:08,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:39:08,687 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2020-10-13 23:39:08,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:08,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521965311] [2020-10-13 23:39:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:08,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:13,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:39:13,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:39:13,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:13,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:39:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:39:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:39:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:13,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:13,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:13,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:13,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:13,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:13,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:13,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:13,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:13,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:13,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:13,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 23:39:13,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521965311] [2020-10-13 23:39:13,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:13,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:39:13,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387820276] [2020-10-13 23:39:13,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:39:13,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:13,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:39:13,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:39:13,822 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 9 states. [2020-10-13 23:39:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:14,063 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-13 23:39:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:39:14,063 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-13 23:39:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:14,065 INFO L225 Difference]: With dead ends: 155 [2020-10-13 23:39:14,066 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:39:14,067 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 [2020-10-13 23:39:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:39:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 23:39:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:39:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-13 23:39:14,077 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 74 [2020-10-13 23:39:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:14,077 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-13 23:39:14,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:39:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-13 23:39:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:39:14,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:14,079 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:14,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:39:14,080 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash 346386898, now seen corresponding path program 6 times [2020-10-13 23:39:14,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:14,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479963865] [2020-10-13 23:39:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:14,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:14,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:19,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:39:19,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:19,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:39:19,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:19,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:39:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:39:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:39:19,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:19,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:19,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:19,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:19,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:19,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:19,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:19,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:19,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:19,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:19,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:19,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-13 23:39:19,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479963865] [2020-10-13 23:39:19,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:19,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:39:19,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264814562] [2020-10-13 23:39:19,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:39:19,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:19,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:39:19,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:39:19,184 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2020-10-13 23:39:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:19,443 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-10-13 23:39:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:39:19,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-13 23:39:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:19,444 INFO L225 Difference]: With dead ends: 172 [2020-10-13 23:39:19,444 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:39:19,445 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 [2020-10-13 23:39:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:39:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 23:39:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:39:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-13 23:39:19,457 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 83 [2020-10-13 23:39:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:19,458 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-13 23:39:19,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:39:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-13 23:39:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:39:19,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:19,460 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:19,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:39:19,460 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash -698280774, now seen corresponding path program 7 times [2020-10-13 23:39:19,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:19,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912047832] [2020-10-13 23:39:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:19,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:24,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:39:24,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:24,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:39:24,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:24,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:39:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 23:39:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:39:24,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:24,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:24,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:24,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:24,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:24,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:24,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:24,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:24,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:24,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:39:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-13 23:39:24,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912047832] [2020-10-13 23:39:24,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:24,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:39:24,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402516295] [2020-10-13 23:39:24,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:39:24,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:24,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:39:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:39:24,629 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 11 states. [2020-10-13 23:39:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:24,911 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2020-10-13 23:39:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:39:24,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 92 [2020-10-13 23:39:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:24,913 INFO L225 Difference]: With dead ends: 189 [2020-10-13 23:39:24,913 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:39:24,916 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 [2020-10-13 23:39:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:39:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 23:39:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:39:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2020-10-13 23:39:24,936 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 92 [2020-10-13 23:39:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:24,937 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2020-10-13 23:39:24,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:39:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2020-10-13 23:39:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:39:24,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:24,939 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:24,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:39:24,943 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash -732453166, now seen corresponding path program 8 times [2020-10-13 23:39:24,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:24,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731733138] [2020-10-13 23:39:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:24,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:29,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:29,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:39:29,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:29,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:39:29,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:29,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:29,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:39:29,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:39:29,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:39:29,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:30,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:30,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:30,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:30,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:30,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:30,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:30,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:30,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 23:39:30,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731733138] [2020-10-13 23:39:30,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:30,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:39:30,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52931467] [2020-10-13 23:39:30,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:39:30,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:39:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:30,076 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2020-10-13 23:39:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:30,309 INFO L93 Difference]: Finished difference Result 206 states and 232 transitions. [2020-10-13 23:39:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:39:30,309 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-13 23:39:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:30,311 INFO L225 Difference]: With dead ends: 206 [2020-10-13 23:39:30,311 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:39:30,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:39:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-13 23:39:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:39:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-10-13 23:39:30,339 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 101 [2020-10-13 23:39:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:30,339 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-10-13 23:39:30,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:39:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-10-13 23:39:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 23:39:30,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:30,343 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:30,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:39:30,343 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:30,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1838619322, now seen corresponding path program 9 times [2020-10-13 23:39:30,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:30,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32596380] [2020-10-13 23:39:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:30,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:30,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:35,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 23:39:35,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:39:35,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:35,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:39:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:39:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:39:35,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:35,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:35,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:35,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:35,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:35,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-13 23:39:35,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32596380] [2020-10-13 23:39:35,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:35,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:39:35,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242133042] [2020-10-13 23:39:35,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:39:35,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:35,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:39:35,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:35,495 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 13 states. [2020-10-13 23:39:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:35,778 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2020-10-13 23:39:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:39:35,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-10-13 23:39:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:35,779 INFO L225 Difference]: With dead ends: 223 [2020-10-13 23:39:35,780 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:39:35,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:39:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 23:39:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:39:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-10-13 23:39:35,789 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 110 [2020-10-13 23:39:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:35,789 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-10-13 23:39:35,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:39:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-10-13 23:39:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:39:35,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:35,791 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:35,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:39:35,792 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1132012590, now seen corresponding path program 10 times [2020-10-13 23:39:35,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:35,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609380069] [2020-10-13 23:39:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:35,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:40,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:39:40,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:39:40,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:40,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:39:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:39:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:39:40,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:40,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:40,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:40,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:40,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:40,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:40,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:40,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:40,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:40,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-13 23:39:40,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609380069] [2020-10-13 23:39:40,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:40,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:39:40,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100474786] [2020-10-13 23:39:40,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:39:40,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:40,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:39:40,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:40,932 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 14 states. [2020-10-13 23:39:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:41,247 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2020-10-13 23:39:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:39:41,247 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2020-10-13 23:39:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:41,249 INFO L225 Difference]: With dead ends: 240 [2020-10-13 23:39:41,249 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:39:41,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:39:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-13 23:39:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:39:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2020-10-13 23:39:41,257 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 119 [2020-10-13 23:39:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:41,257 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2020-10-13 23:39:41,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:39:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2020-10-13 23:39:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 23:39:41,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:41,259 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:41,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:39:41,259 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:41,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1513332922, now seen corresponding path program 11 times [2020-10-13 23:39:41,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:41,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906350263] [2020-10-13 23:39:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:41,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:46,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 23:39:46,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:39:46,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:46,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:39:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-13 23:39:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:39:46,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:46,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:46,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:46,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:46,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:46,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:46,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:46,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:46,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 23:39:46,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906350263] [2020-10-13 23:39:46,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:46,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:39:46,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671009681] [2020-10-13 23:39:46,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:39:46,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:46,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:39:46,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:39:46,419 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 15 states. [2020-10-13 23:39:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:46,757 INFO L93 Difference]: Finished difference Result 257 states and 283 transitions. [2020-10-13 23:39:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:39:46,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2020-10-13 23:39:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:46,760 INFO L225 Difference]: With dead ends: 257 [2020-10-13 23:39:46,760 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:39:46,761 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 [2020-10-13 23:39:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:39:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 23:39:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:39:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2020-10-13 23:39:46,770 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 128 [2020-10-13 23:39:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:46,770 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2020-10-13 23:39:46,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:39:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2020-10-13 23:39:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:39:46,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:46,772 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:46,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:39:46,772 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:46,773 INFO L82 PathProgramCache]: Analyzing trace with hash 892014802, now seen corresponding path program 12 times [2020-10-13 23:39:46,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:46,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707531700] [2020-10-13 23:39:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:46,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:51,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:39:51,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:39:51,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:51,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:51,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:39:51,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:51,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:39:51,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:51,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:51,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:51,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:51,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:51,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:51,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:51,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2020-10-13 23:39:51,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707531700] [2020-10-13 23:39:51,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:51,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:39:51,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978045398] [2020-10-13 23:39:51,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:39:51,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:39:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:39:51,967 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 16 states. [2020-10-13 23:39:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:52,355 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-10-13 23:39:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:39:52,355 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-10-13 23:39:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:52,357 INFO L225 Difference]: With dead ends: 274 [2020-10-13 23:39:52,357 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:39:52,358 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 [2020-10-13 23:39:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:39:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 23:39:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 23:39:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2020-10-13 23:39:52,366 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 137 [2020-10-13 23:39:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:52,367 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2020-10-13 23:39:52,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:39:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2020-10-13 23:39:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 23:39:52,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:52,369 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:52,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:39:52,369 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1312905542, now seen corresponding path program 13 times [2020-10-13 23:39:52,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:52,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350725454] [2020-10-13 23:39:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:52,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:57,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 23:39:57,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:57,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:39:57,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:57,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:57,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:39:57,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 23:39:57,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:39:57,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:57,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:57,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:57,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:57,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:57,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:57,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:57,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:57,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-13 23:39:57,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350725454] [2020-10-13 23:39:57,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:57,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:39:57,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927873983] [2020-10-13 23:39:57,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:39:57,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:57,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:39:57,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:39:57,570 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand 17 states. [2020-10-13 23:39:57,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:57,961 INFO L93 Difference]: Finished difference Result 291 states and 317 transitions. [2020-10-13 23:39:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:39:57,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 146 [2020-10-13 23:39:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:57,962 INFO L225 Difference]: With dead ends: 291 [2020-10-13 23:39:57,962 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:39:57,963 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 [2020-10-13 23:39:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:39:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 23:39:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 23:39:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-10-13 23:39:57,972 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 146 [2020-10-13 23:39:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:57,972 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-10-13 23:39:57,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:39:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-10-13 23:39:57,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 23:39:57,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:57,974 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:57,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:39:57,975 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 305939922, now seen corresponding path program 14 times [2020-10-13 23:39:57,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:57,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510020298] [2020-10-13 23:39:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:57,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:03,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 23:40:03,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:40:03,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:03,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:40:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:40:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:40:03,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:03,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:03,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:03,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:03,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:03,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:03,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:03,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:03,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-13 23:40:03,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510020298] [2020-10-13 23:40:03,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:03,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:40:03,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286051622] [2020-10-13 23:40:03,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:40:03,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:03,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:40:03,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:40:03,185 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand 18 states. [2020-10-13 23:40:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:03,589 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2020-10-13 23:40:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:40:03,590 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 155 [2020-10-13 23:40:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:03,592 INFO L225 Difference]: With dead ends: 308 [2020-10-13 23:40:03,592 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 23:40:03,593 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 [2020-10-13 23:40:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 23:40:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-13 23:40:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 23:40:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2020-10-13 23:40:03,601 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 155 [2020-10-13 23:40:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:03,602 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2020-10-13 23:40:03,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:40:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2020-10-13 23:40:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 23:40:03,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:03,604 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:03,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:40:03,605 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:03,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2109746362, now seen corresponding path program 15 times [2020-10-13 23:40:03,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:03,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267572599] [2020-10-13 23:40:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:08,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:08,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 23:40:08,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:08,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:40:08,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:08,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:40:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-13 23:40:08,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:40:08,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:08,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:08,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:08,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:08,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:08,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:08,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:40:08,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:08,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:08,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:08,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:08,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:08,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2020-10-13 23:40:08,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267572599] [2020-10-13 23:40:08,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:08,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:40:08,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664899114] [2020-10-13 23:40:08,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:40:08,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:40:08,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:40:08,850 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 19 states. [2020-10-13 23:40:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:09,287 INFO L93 Difference]: Finished difference Result 325 states and 351 transitions. [2020-10-13 23:40:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:40:09,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 164 [2020-10-13 23:40:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:09,290 INFO L225 Difference]: With dead ends: 325 [2020-10-13 23:40:09,290 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 23:40:09,291 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 [2020-10-13 23:40:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 23:40:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-13 23:40:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:40:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 187 transitions. [2020-10-13 23:40:09,299 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 187 transitions. Word has length 164 [2020-10-13 23:40:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:09,299 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 187 transitions. [2020-10-13 23:40:09,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:40:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 187 transitions. [2020-10-13 23:40:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 23:40:09,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:09,301 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:09,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:40:09,302 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash 330463954, now seen corresponding path program 16 times [2020-10-13 23:40:09,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:09,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550205734] [2020-10-13 23:40:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:09,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:40:14,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:14,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:14,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:14,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:14,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:14,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:14,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:14,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:14,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:14,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2020-10-13 23:40:14,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550205734] [2020-10-13 23:40:14,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:14,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:40:14,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030482467] [2020-10-13 23:40:14,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:40:14,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:14,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:40:14,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:40:14,573 INFO L87 Difference]: Start difference. First operand 178 states and 187 transitions. Second operand 20 states. [2020-10-13 23:40:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:14,968 INFO L93 Difference]: Finished difference Result 342 states and 368 transitions. [2020-10-13 23:40:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:40:14,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 173 [2020-10-13 23:40:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:14,971 INFO L225 Difference]: With dead ends: 342 [2020-10-13 23:40:14,971 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:40:14,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:40:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:40:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-13 23:40:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 23:40:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 196 transitions. [2020-10-13 23:40:14,981 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 196 transitions. Word has length 173 [2020-10-13 23:40:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:14,981 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 196 transitions. [2020-10-13 23:40:14,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:40:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 196 transitions. [2020-10-13 23:40:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 23:40:14,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:14,984 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:14,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:40:14,984 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:14,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1002451642, now seen corresponding path program 17 times [2020-10-13 23:40:14,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:14,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852522948] [2020-10-13 23:40:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:15,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:20,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 23:40:20,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:20,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:40:20,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:20,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:40:20,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:40:20,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:40:20,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:20,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:20,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:20,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:20,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:20,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:20,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:20,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:20,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:20,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:20,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2020-10-13 23:40:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852522948] [2020-10-13 23:40:20,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:20,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:40:20,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363221863] [2020-10-13 23:40:20,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:40:20,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:40:20,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:40:20,253 INFO L87 Difference]: Start difference. First operand 187 states and 196 transitions. Second operand 21 states. [2020-10-13 23:40:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:20,682 INFO L93 Difference]: Finished difference Result 359 states and 385 transitions. [2020-10-13 23:40:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:40:20,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-10-13 23:40:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:20,684 INFO L225 Difference]: With dead ends: 359 [2020-10-13 23:40:20,685 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:40:20,686 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 [2020-10-13 23:40:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:40:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-13 23:40:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 23:40:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2020-10-13 23:40:20,694 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 182 [2020-10-13 23:40:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:20,695 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2020-10-13 23:40:20,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:40:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2020-10-13 23:40:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 23:40:20,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:20,697 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:20,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:40:20,698 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:20,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1703260114, now seen corresponding path program 18 times [2020-10-13 23:40:20,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:20,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666080216] [2020-10-13 23:40:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:20,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:21,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:25,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:25,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 23:40:25,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:25,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:40:25,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:25,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:40:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:40:25,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:25,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:25,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:25,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:25,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:25,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:25,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:25,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:25,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:25,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2020-10-13 23:40:25,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666080216] [2020-10-13 23:40:25,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:25,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:40:25,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163604346] [2020-10-13 23:40:25,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:40:25,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:25,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:40:25,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:40:25,990 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 22 states. [2020-10-13 23:40:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:26,415 INFO L93 Difference]: Finished difference Result 376 states and 402 transitions. [2020-10-13 23:40:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:40:26,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2020-10-13 23:40:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:26,418 INFO L225 Difference]: With dead ends: 376 [2020-10-13 23:40:26,418 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 23:40:26,419 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 [2020-10-13 23:40:26,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 23:40:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-10-13 23:40:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 23:40:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 214 transitions. [2020-10-13 23:40:26,429 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 214 transitions. Word has length 191 [2020-10-13 23:40:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:26,429 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 214 transitions. [2020-10-13 23:40:26,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:40:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 214 transitions. [2020-10-13 23:40:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-13 23:40:26,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:26,431 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:26,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:40:26,431 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1564915898, now seen corresponding path program 19 times [2020-10-13 23:40:26,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:26,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285799699] [2020-10-13 23:40:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:26,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:31,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-13 23:40:31,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:31,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:40:31,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:31,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:40:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:40:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:40:31,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:31,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:31,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:31,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:31,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:31,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:31,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:31,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:31,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 23:40:31,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285799699] [2020-10-13 23:40:31,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:31,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:40:31,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546325577] [2020-10-13 23:40:31,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:40:31,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:40:31,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:40:31,753 INFO L87 Difference]: Start difference. First operand 205 states and 214 transitions. Second operand 23 states. [2020-10-13 23:40:32,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:32,287 INFO L93 Difference]: Finished difference Result 393 states and 419 transitions. [2020-10-13 23:40:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:40:32,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-10-13 23:40:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:32,291 INFO L225 Difference]: With dead ends: 393 [2020-10-13 23:40:32,291 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 23:40:32,293 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 [2020-10-13 23:40:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 23:40:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-13 23:40:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 23:40:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2020-10-13 23:40:32,306 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 200 [2020-10-13 23:40:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:32,308 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2020-10-13 23:40:32,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:40:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2020-10-13 23:40:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 23:40:32,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:32,311 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:32,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:40:32,311 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 531490002, now seen corresponding path program 20 times [2020-10-13 23:40:32,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:32,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440327293] [2020-10-13 23:40:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:34,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:37,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 23:40:37,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:37,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:40:37,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:37,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:37,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:40:37,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:40:37,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:40:37,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:37,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:37,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:37,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:37,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:37,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:37,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:37,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:37,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:37,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:37,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:37,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2020-10-13 23:40:37,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440327293] [2020-10-13 23:40:37,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:37,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:40:37,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180129741] [2020-10-13 23:40:37,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:40:37,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:40:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:40:37,706 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 24 states. [2020-10-13 23:40:38,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:38,239 INFO L93 Difference]: Finished difference Result 410 states and 436 transitions. [2020-10-13 23:40:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:40:38,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-10-13 23:40:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:38,242 INFO L225 Difference]: With dead ends: 410 [2020-10-13 23:40:38,242 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 23:40:38,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:40:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 23:40:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-10-13 23:40:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-13 23:40:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 232 transitions. [2020-10-13 23:40:38,256 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 232 transitions. Word has length 209 [2020-10-13 23:40:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:38,257 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 232 transitions. [2020-10-13 23:40:38,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:40:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 232 transitions. [2020-10-13 23:40:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-13 23:40:38,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:38,258 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:38,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:40:38,259 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash -941900102, now seen corresponding path program 21 times [2020-10-13 23:40:38,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:38,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655251633] [2020-10-13 23:40:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:39,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:43,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:43,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-13 23:40:43,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:43,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:40:43,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:43,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:40:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-13 23:40:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:40:43,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:43,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:43,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:43,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:43,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:43,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:43,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:43,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:43,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:43,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:43,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:43,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:43,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2020-10-13 23:40:43,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655251633] [2020-10-13 23:40:43,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:43,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:40:43,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572970504] [2020-10-13 23:40:43,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:40:43,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:43,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:40:43,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:43,658 INFO L87 Difference]: Start difference. First operand 223 states and 232 transitions. Second operand 25 states. [2020-10-13 23:40:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:44,239 INFO L93 Difference]: Finished difference Result 427 states and 453 transitions. [2020-10-13 23:40:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:40:44,240 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-10-13 23:40:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:44,241 INFO L225 Difference]: With dead ends: 427 [2020-10-13 23:40:44,242 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 23:40:44,243 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 [2020-10-13 23:40:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 23:40:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-13 23:40:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:40:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2020-10-13 23:40:44,251 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 218 [2020-10-13 23:40:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:44,251 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2020-10-13 23:40:44,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:40:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2020-10-13 23:40:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:40:44,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:44,253 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:44,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:40:44,254 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:44,254 INFO L82 PathProgramCache]: Analyzing trace with hash -970778158, now seen corresponding path program 22 times [2020-10-13 23:40:44,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:44,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205336460] [2020-10-13 23:40:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:44,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:45,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:49,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:49,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 23:40:49,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:49,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 23:40:49,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:49,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:49,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:40:49,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-13 23:40:49,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:40:49,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:49,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:49,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:49,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:49,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:49,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:49,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:49,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:49,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:49,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:49,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:40:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2020-10-13 23:40:49,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205336460] [2020-10-13 23:40:49,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:49,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:40:49,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239380571] [2020-10-13 23:40:49,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:40:49,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:40:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:49,837 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand 26 states. [2020-10-13 23:40:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:50,457 INFO L93 Difference]: Finished difference Result 444 states and 470 transitions. [2020-10-13 23:40:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:40:50,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 227 [2020-10-13 23:40:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:50,460 INFO L225 Difference]: With dead ends: 444 [2020-10-13 23:40:50,460 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 23:40:50,461 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 [2020-10-13 23:40:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 23:40:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-10-13 23:40:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-13 23:40:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 250 transitions. [2020-10-13 23:40:50,475 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 250 transitions. Word has length 227 [2020-10-13 23:40:50,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:50,476 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 250 transitions. [2020-10-13 23:40:50,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:40:50,476 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 250 transitions. [2020-10-13 23:40:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-13 23:40:50,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:50,479 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:50,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:40:50,485 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1426539706, now seen corresponding path program 23 times [2020-10-13 23:40:50,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:50,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618468416] [2020-10-13 23:40:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:51,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:51,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:55,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:55,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-13 23:40:55,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:55,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 23:40:55,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:55,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:40:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:40:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:40:55,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:56,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:56,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:56,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:56,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:56,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:56,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:56,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:56,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2020-10-13 23:40:56,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618468416] [2020-10-13 23:40:56,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:56,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:40:56,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768852104] [2020-10-13 23:40:56,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:40:56,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:40:56,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:40:56,070 INFO L87 Difference]: Start difference. First operand 241 states and 250 transitions. Second operand 27 states. [2020-10-13 23:40:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:56,568 INFO L93 Difference]: Finished difference Result 461 states and 487 transitions. [2020-10-13 23:40:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:40:56,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2020-10-13 23:40:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:56,570 INFO L225 Difference]: With dead ends: 461 [2020-10-13 23:40:56,570 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 23:40:56,571 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 [2020-10-13 23:40:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 23:40:56,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-13 23:40:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 23:40:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 259 transitions. [2020-10-13 23:40:56,582 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 259 transitions. Word has length 236 [2020-10-13 23:40:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:56,582 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 259 transitions. [2020-10-13 23:40:56,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:40:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 259 transitions. [2020-10-13 23:40:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 23:40:56,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:56,584 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:56,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:40:56,584 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:56,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash -925020462, now seen corresponding path program 24 times [2020-10-13 23:40:56,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:56,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567827045] [2020-10-13 23:40:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:56,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:57,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:57,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:58,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:01,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:01,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-13 23:41:01,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:01,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:41:01,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:01,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:41:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 23:41:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:41:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:02,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:02,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:02,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:02,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:02,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:02,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:02,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:02,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:02,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:02,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:02,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-13 23:41:02,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567827045] [2020-10-13 23:41:02,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:02,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:41:02,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879993996] [2020-10-13 23:41:02,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:41:02,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:02,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:41:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:41:02,095 INFO L87 Difference]: Start difference. First operand 250 states and 259 transitions. Second operand 28 states. [2020-10-13 23:41:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:02,707 INFO L93 Difference]: Finished difference Result 478 states and 504 transitions. [2020-10-13 23:41:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:41:02,707 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 245 [2020-10-13 23:41:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:02,709 INFO L225 Difference]: With dead ends: 478 [2020-10-13 23:41:02,710 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 23:41:02,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:41:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 23:41:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-10-13 23:41:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-13 23:41:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 268 transitions. [2020-10-13 23:41:02,720 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 268 transitions. Word has length 245 [2020-10-13 23:41:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:02,721 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 268 transitions. [2020-10-13 23:41:02,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:41:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 268 transitions. [2020-10-13 23:41:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-13 23:41:02,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:02,723 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:02,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:41:02,723 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1381059258, now seen corresponding path program 25 times [2020-10-13 23:41:02,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:02,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549334258] [2020-10-13 23:41:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:02,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:03,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:03,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:03,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:04,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:07,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:07,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-13 23:41:07,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:07,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 23:41:07,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:07,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:07,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:41:07,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-10-13 23:41:07,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:41:07,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:08,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:08,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:08,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:08,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:08,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:08,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:08,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:08,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:08,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2600 trivial. 0 not checked. [2020-10-13 23:41:08,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549334258] [2020-10-13 23:41:08,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:08,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:41:08,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108650950] [2020-10-13 23:41:08,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:41:08,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:08,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:41:08,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:41:08,273 INFO L87 Difference]: Start difference. First operand 259 states and 268 transitions. Second operand 29 states. [2020-10-13 23:41:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:08,908 INFO L93 Difference]: Finished difference Result 495 states and 521 transitions. [2020-10-13 23:41:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:41:08,909 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 254 [2020-10-13 23:41:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:08,911 INFO L225 Difference]: With dead ends: 495 [2020-10-13 23:41:08,911 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 23:41:08,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:41:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 23:41:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-13 23:41:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 23:41:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2020-10-13 23:41:08,922 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 254 [2020-10-13 23:41:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:08,922 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2020-10-13 23:41:08,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:41:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2020-10-13 23:41:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-13 23:41:08,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:08,924 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:08,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:41:08,924 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash 64259026, now seen corresponding path program 26 times [2020-10-13 23:41:08,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:08,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384755564] [2020-10-13 23:41:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:08,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:09,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:10,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:13,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:13,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-13 23:41:13,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:13,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:41:13,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:13,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:13,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:41:13,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:41:13,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:41:13,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:14,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:14,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:14,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:14,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:14,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:14,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:14,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:14,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:14,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2020-10-13 23:41:14,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384755564] [2020-10-13 23:41:14,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:14,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:41:14,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74088917] [2020-10-13 23:41:14,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:41:14,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:14,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:41:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:41:14,464 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand 30 states. [2020-10-13 23:41:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:15,095 INFO L93 Difference]: Finished difference Result 512 states and 538 transitions. [2020-10-13 23:41:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:41:15,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-10-13 23:41:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:15,098 INFO L225 Difference]: With dead ends: 512 [2020-10-13 23:41:15,098 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 23:41:15,099 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 [2020-10-13 23:41:15,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 23:41:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-13 23:41:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-13 23:41:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 286 transitions. [2020-10-13 23:41:15,109 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 286 transitions. Word has length 263 [2020-10-13 23:41:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:15,109 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 286 transitions. [2020-10-13 23:41:15,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:41:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 286 transitions. [2020-10-13 23:41:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-13 23:41:15,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:15,111 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:15,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:41:15,111 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:15,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:15,112 INFO L82 PathProgramCache]: Analyzing trace with hash 21090490, now seen corresponding path program 27 times [2020-10-13 23:41:15,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:15,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396794457] [2020-10-13 23:41:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:17,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:20,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:20,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-13 23:41:20,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:20,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:41:20,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:20,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:20,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:41:20,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 23:41:20,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:41:20,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:20,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:20,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:20,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:20,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:20,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:20,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:20,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:20,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3024 trivial. 0 not checked. [2020-10-13 23:41:20,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396794457] [2020-10-13 23:41:20,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:20,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:41:20,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388846261] [2020-10-13 23:41:20,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:41:20,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:20,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:41:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:41:20,654 INFO L87 Difference]: Start difference. First operand 277 states and 286 transitions. Second operand 31 states. [2020-10-13 23:41:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:21,254 INFO L93 Difference]: Finished difference Result 529 states and 555 transitions. [2020-10-13 23:41:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:41:21,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 272 [2020-10-13 23:41:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:21,256 INFO L225 Difference]: With dead ends: 529 [2020-10-13 23:41:21,256 INFO L226 Difference]: Without dead ends: 286 [2020-10-13 23:41:21,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:41:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-13 23:41:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2020-10-13 23:41:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 23:41:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 295 transitions. [2020-10-13 23:41:21,267 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 295 transitions. Word has length 272 [2020-10-13 23:41:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:21,267 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 295 transitions. [2020-10-13 23:41:21,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:41:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 295 transitions. [2020-10-13 23:41:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-13 23:41:21,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:21,269 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:21,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:41:21,270 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1057011922, now seen corresponding path program 28 times [2020-10-13 23:41:21,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:21,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497606266] [2020-10-13 23:41:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:21,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:23,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:26,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:26,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-13 23:41:26,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:26,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 23:41:26,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:26,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:41:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:41:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:41:26,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:26,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:26,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:26,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:26,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:26,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:26,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:26,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:26,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:26,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:26,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:26,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:26,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3654 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3248 trivial. 0 not checked. [2020-10-13 23:41:26,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497606266] [2020-10-13 23:41:26,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:26,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:41:26,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750281487] [2020-10-13 23:41:26,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:41:26,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:26,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:41:26,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:41:26,918 INFO L87 Difference]: Start difference. First operand 286 states and 295 transitions. Second operand 32 states. [2020-10-13 23:41:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:27,635 INFO L93 Difference]: Finished difference Result 546 states and 572 transitions. [2020-10-13 23:41:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:41:27,636 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 281 [2020-10-13 23:41:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:27,638 INFO L225 Difference]: With dead ends: 546 [2020-10-13 23:41:27,638 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 23:41:27,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:41:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 23:41:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-10-13 23:41:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-13 23:41:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 304 transitions. [2020-10-13 23:41:27,648 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 304 transitions. Word has length 281 [2020-10-13 23:41:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:27,648 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 304 transitions. [2020-10-13 23:41:27,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:41:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 304 transitions. [2020-10-13 23:41:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-13 23:41:27,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:27,650 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:27,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:41:27,650 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:27,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:27,651 INFO L82 PathProgramCache]: Analyzing trace with hash 392222394, now seen corresponding path program 29 times [2020-10-13 23:41:27,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:27,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210915961] [2020-10-13 23:41:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:27,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:27,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:28,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:28,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:30,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:32,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:32,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-13 23:41:32,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:41:32,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:32,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:41:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-13 23:41:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:41:32,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:33,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:33,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:33,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:33,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:33,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:33,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:33,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:33,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:33,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:33,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:33,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:33,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:41:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2020-10-13 23:41:33,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210915961] [2020-10-13 23:41:33,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:33,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:41:33,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909825039] [2020-10-13 23:41:33,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:41:33,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:33,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:41:33,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:33,279 INFO L87 Difference]: Start difference. First operand 295 states and 304 transitions. Second operand 33 states. [2020-10-13 23:41:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:34,024 INFO L93 Difference]: Finished difference Result 563 states and 589 transitions. [2020-10-13 23:41:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:41:34,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 290 [2020-10-13 23:41:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:34,027 INFO L225 Difference]: With dead ends: 563 [2020-10-13 23:41:34,027 INFO L226 Difference]: Without dead ends: 304 [2020-10-13 23:41:34,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-13 23:41:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-10-13 23:41:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-13 23:41:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 313 transitions. [2020-10-13 23:41:34,038 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 313 transitions. Word has length 290 [2020-10-13 23:41:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:34,038 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 313 transitions. [2020-10-13 23:41:34,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:41:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 313 transitions. [2020-10-13 23:41:34,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-13 23:41:34,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:34,040 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:34,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:41:34,041 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1369838126, now seen corresponding path program 30 times [2020-10-13 23:41:34,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:34,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594006086] [2020-10-13 23:41:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:34,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:36,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:39,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:39,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-13 23:41:39,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:41:39,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:39,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:41:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:41:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:41:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:39,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:39,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:39,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:39,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:39,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:39,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:39,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:39,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:39,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:39,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:39,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:39,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4185 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3720 trivial. 0 not checked. [2020-10-13 23:41:39,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594006086] [2020-10-13 23:41:39,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:39,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:41:39,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800458855] [2020-10-13 23:41:39,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:41:39,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:39,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:41:39,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:41:39,697 INFO L87 Difference]: Start difference. First operand 304 states and 313 transitions. Second operand 34 states. [2020-10-13 23:41:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:40,480 INFO L93 Difference]: Finished difference Result 580 states and 606 transitions. [2020-10-13 23:41:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:41:40,480 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 299 [2020-10-13 23:41:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:40,483 INFO L225 Difference]: With dead ends: 580 [2020-10-13 23:41:40,483 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 23:41:40,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:41:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 23:41:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2020-10-13 23:41:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-13 23:41:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 322 transitions. [2020-10-13 23:41:40,495 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 322 transitions. Word has length 299 [2020-10-13 23:41:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:40,495 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 322 transitions. [2020-10-13 23:41:40,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:41:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 322 transitions. [2020-10-13 23:41:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-13 23:41:40,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:40,498 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:40,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:41:40,498 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1043750074, now seen corresponding path program 31 times [2020-10-13 23:41:40,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:40,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252578419] [2020-10-13 23:41:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:40,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:40,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:41,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:41,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:43,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:45,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:45,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-13 23:41:45,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:45,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 23:41:45,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:45,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:41:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 143 [2020-10-13 23:41:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:41:45,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:46,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:46,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:46,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:46,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:46,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:46,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:41:46,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:46,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:46,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4464 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3968 trivial. 0 not checked. [2020-10-13 23:41:46,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252578419] [2020-10-13 23:41:46,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:46,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:41:46,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158425427] [2020-10-13 23:41:46,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:41:46,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:46,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:41:46,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:41:46,320 INFO L87 Difference]: Start difference. First operand 313 states and 322 transitions. Second operand 35 states. [2020-10-13 23:41:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:47,083 INFO L93 Difference]: Finished difference Result 597 states and 623 transitions. [2020-10-13 23:41:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:41:47,084 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 308 [2020-10-13 23:41:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:47,086 INFO L225 Difference]: With dead ends: 597 [2020-10-13 23:41:47,086 INFO L226 Difference]: Without dead ends: 322 [2020-10-13 23:41:47,087 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 [2020-10-13 23:41:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-13 23:41:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-10-13 23:41:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-13 23:41:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 331 transitions. [2020-10-13 23:41:47,101 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 331 transitions. Word has length 308 [2020-10-13 23:41:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:47,101 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 331 transitions. [2020-10-13 23:41:47,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:41:47,101 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 331 transitions. [2020-10-13 23:41:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-13 23:41:47,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:47,105 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:47,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:41:47,105 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:47,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1909990098, now seen corresponding path program 32 times [2020-10-13 23:41:47,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:47,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369146709] [2020-10-13 23:41:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:52,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:52,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-13 23:41:52,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:52,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:41:52,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:52,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:52,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:41:52,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-13 23:41:52,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:41:52,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:52,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:52,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:52,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:52,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:52,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:52,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:52,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:52,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:52,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:52,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:52,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:52,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2020-10-13 23:41:52,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369146709] [2020-10-13 23:41:52,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:52,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:41:52,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394879934] [2020-10-13 23:41:52,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:41:52,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:52,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:41:52,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:41:52,861 INFO L87 Difference]: Start difference. First operand 322 states and 331 transitions. Second operand 36 states. [2020-10-13 23:41:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:53,704 INFO L93 Difference]: Finished difference Result 614 states and 640 transitions. [2020-10-13 23:41:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:41:53,705 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 317 [2020-10-13 23:41:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:53,707 INFO L225 Difference]: With dead ends: 614 [2020-10-13 23:41:53,707 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 23:41:53,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:41:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 23:41:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2020-10-13 23:41:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-13 23:41:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 340 transitions. [2020-10-13 23:41:53,718 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 340 transitions. Word has length 317 [2020-10-13 23:41:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:53,718 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 340 transitions. [2020-10-13 23:41:53,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:41:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 340 transitions. [2020-10-13 23:41:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-13 23:41:53,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:53,721 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:53,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:41:53,721 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:53,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1823841606, now seen corresponding path program 33 times [2020-10-13 23:41:53,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:53,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774449481] [2020-10-13 23:41:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:53,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:53,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:56,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:58,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:41:58,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:59,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:59,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:59,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:59,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:59,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:59,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5049 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2020-10-13 23:41:59,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774449481] [2020-10-13 23:41:59,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:59,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:41:59,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633376775] [2020-10-13 23:41:59,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:41:59,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:59,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:41:59,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:41:59,527 INFO L87 Difference]: Start difference. First operand 331 states and 340 transitions. Second operand 37 states. [2020-10-13 23:42:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:00,303 INFO L93 Difference]: Finished difference Result 631 states and 657 transitions. [2020-10-13 23:42:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:42:00,304 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 326 [2020-10-13 23:42:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:00,306 INFO L225 Difference]: With dead ends: 631 [2020-10-13 23:42:00,306 INFO L226 Difference]: Without dead ends: 340 [2020-10-13 23:42:00,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:42:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-13 23:42:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2020-10-13 23:42:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-13 23:42:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 349 transitions. [2020-10-13 23:42:00,317 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 349 transitions. Word has length 326 [2020-10-13 23:42:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:00,317 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 349 transitions. [2020-10-13 23:42:00,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:42:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 349 transitions. [2020-10-13 23:42:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-13 23:42:00,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:00,320 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:00,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:42:00,320 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 359880658, now seen corresponding path program 34 times [2020-10-13 23:42:00,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:00,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234504379] [2020-10-13 23:42:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:00,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:00,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:00,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:00,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:01,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:03,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:05,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:05,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-13 23:42:05,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:05,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:42:05,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:05,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:05,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:42:05,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-13 23:42:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:42:05,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:06,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:06,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:06,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:06,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:06,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:06,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:06,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:06,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:06,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2020-10-13 23:42:06,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234504379] [2020-10-13 23:42:06,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:06,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:42:06,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484872452] [2020-10-13 23:42:06,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:42:06,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:06,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:42:06,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:42:06,156 INFO L87 Difference]: Start difference. First operand 340 states and 349 transitions. Second operand 38 states. [2020-10-13 23:42:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:07,015 INFO L93 Difference]: Finished difference Result 648 states and 674 transitions. [2020-10-13 23:42:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:42:07,015 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 335 [2020-10-13 23:42:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:07,018 INFO L225 Difference]: With dead ends: 648 [2020-10-13 23:42:07,018 INFO L226 Difference]: Without dead ends: 349 [2020-10-13 23:42:07,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:42:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-13 23:42:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2020-10-13 23:42:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-13 23:42:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 358 transitions. [2020-10-13 23:42:07,029 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 358 transitions. Word has length 335 [2020-10-13 23:42:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:07,029 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 358 transitions. [2020-10-13 23:42:07,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:42:07,029 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 358 transitions. [2020-10-13 23:42:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-13 23:42:07,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:07,032 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:07,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:42:07,032 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:07,033 INFO L82 PathProgramCache]: Analyzing trace with hash 673507514, now seen corresponding path program 35 times [2020-10-13 23:42:07,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:07,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455915466] [2020-10-13 23:42:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:12,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:12,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-13 23:42:12,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:12,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 23:42:12,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:12,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:12,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:42:12,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 23:42:12,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:42:12,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:12,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:12,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:12,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:12,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5670 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2020-10-13 23:42:12,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455915466] [2020-10-13 23:42:12,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:12,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:42:12,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694035924] [2020-10-13 23:42:12,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:42:12,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:42:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:42:12,917 INFO L87 Difference]: Start difference. First operand 349 states and 358 transitions. Second operand 39 states. [2020-10-13 23:42:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:13,797 INFO L93 Difference]: Finished difference Result 665 states and 691 transitions. [2020-10-13 23:42:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:42:13,798 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 344 [2020-10-13 23:42:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:13,799 INFO L225 Difference]: With dead ends: 665 [2020-10-13 23:42:13,799 INFO L226 Difference]: Without dead ends: 358 [2020-10-13 23:42:13,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:42:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-13 23:42:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-10-13 23:42:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-13 23:42:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 367 transitions. [2020-10-13 23:42:13,810 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 367 transitions. Word has length 344 [2020-10-13 23:42:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:13,810 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 367 transitions. [2020-10-13 23:42:13,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:42:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 367 transitions. [2020-10-13 23:42:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-13 23:42:13,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:13,813 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:13,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:42:13,813 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:13,814 INFO L82 PathProgramCache]: Analyzing trace with hash 287542482, now seen corresponding path program 36 times [2020-10-13 23:42:13,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:13,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118583300] [2020-10-13 23:42:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:13,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:18,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:18,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-13 23:42:18,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:42:18,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-13 23:42:18,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:18,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:18,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:42:18,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:42:18,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:42:18,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:19,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:19,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:19,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:19,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:19,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:19,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:19,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:19,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:19,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:19,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:19,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:19,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 5328 trivial. 0 not checked. [2020-10-13 23:42:19,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118583300] [2020-10-13 23:42:19,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:19,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:42:19,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433351570] [2020-10-13 23:42:19,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:42:19,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:19,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:42:19,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:42:19,780 INFO L87 Difference]: Start difference. First operand 358 states and 367 transitions. Second operand 40 states. [2020-10-13 23:42:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:20,626 INFO L93 Difference]: Finished difference Result 682 states and 708 transitions. [2020-10-13 23:42:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:42:20,627 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 353 [2020-10-13 23:42:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:20,629 INFO L225 Difference]: With dead ends: 682 [2020-10-13 23:42:20,629 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 23:42:20,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:42:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 23:42:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2020-10-13 23:42:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-13 23:42:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 376 transitions. [2020-10-13 23:42:20,639 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 376 transitions. Word has length 353 [2020-10-13 23:42:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:20,640 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 376 transitions. [2020-10-13 23:42:20,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:42:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 376 transitions. [2020-10-13 23:42:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-13 23:42:20,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:20,642 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:20,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:42:20,643 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:20,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2108821830, now seen corresponding path program 37 times [2020-10-13 23:42:20,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:20,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164645411] [2020-10-13 23:42:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:20,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:20,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:21,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:21,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:21,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:25,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:25,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-13 23:42:25,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:25,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:42:25,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:25,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:42:25,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 23:42:25,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:42:25,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:26,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:26,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:26,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:26,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:26,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:26,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:26,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:26,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:26,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:26,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6327 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 5624 trivial. 0 not checked. [2020-10-13 23:42:26,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164645411] [2020-10-13 23:42:26,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:26,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:42:26,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325634618] [2020-10-13 23:42:26,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:42:26,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:42:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:42:26,593 INFO L87 Difference]: Start difference. First operand 367 states and 376 transitions. Second operand 41 states. [2020-10-13 23:42:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:27,554 INFO L93 Difference]: Finished difference Result 699 states and 725 transitions. [2020-10-13 23:42:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:42:27,554 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 362 [2020-10-13 23:42:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:27,556 INFO L225 Difference]: With dead ends: 699 [2020-10-13 23:42:27,556 INFO L226 Difference]: Without dead ends: 376 [2020-10-13 23:42:27,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:42:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-13 23:42:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-10-13 23:42:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-13 23:42:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 385 transitions. [2020-10-13 23:42:27,566 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 385 transitions. Word has length 362 [2020-10-13 23:42:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:27,567 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 385 transitions. [2020-10-13 23:42:27,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:42:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 385 transitions. [2020-10-13 23:42:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-13 23:42:27,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:27,570 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:27,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:42:27,570 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:27,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1222689234, now seen corresponding path program 38 times [2020-10-13 23:42:27,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:27,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145520143] [2020-10-13 23:42:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:32,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:32,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:32,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-13 23:42:32,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:32,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-13 23:42:32,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:32,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:32,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:42:32,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:32,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:42:32,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:33,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:33,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:33,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:33,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:33,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:33,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:33,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:33,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:33,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6669 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 5928 trivial. 0 not checked. [2020-10-13 23:42:33,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145520143] [2020-10-13 23:42:33,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:33,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:42:33,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437055385] [2020-10-13 23:42:33,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:42:33,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:42:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:42:33,578 INFO L87 Difference]: Start difference. First operand 376 states and 385 transitions. Second operand 42 states. [2020-10-13 23:42:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:34,533 INFO L93 Difference]: Finished difference Result 716 states and 742 transitions. [2020-10-13 23:42:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:42:34,533 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 371 [2020-10-13 23:42:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:34,536 INFO L225 Difference]: With dead ends: 716 [2020-10-13 23:42:34,536 INFO L226 Difference]: Without dead ends: 385 [2020-10-13 23:42:34,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:42:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-13 23:42:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2020-10-13 23:42:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-13 23:42:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 394 transitions. [2020-10-13 23:42:34,547 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 394 transitions. Word has length 371 [2020-10-13 23:42:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:34,547 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 394 transitions. [2020-10-13 23:42:34,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:42:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 394 transitions. [2020-10-13 23:42:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-13 23:42:34,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:34,550 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:34,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:42:34,550 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash 458060986, now seen corresponding path program 39 times [2020-10-13 23:42:34,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:34,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940308421] [2020-10-13 23:42:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:39,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 388 [2020-10-13 23:42:39,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-13 23:42:39,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:39,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:42:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:42:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:42:39,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0