/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_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:38:28,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:38:28,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:38:28,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:38:28,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:38:28,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:38:28,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:38:28,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:38:28,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:38:28,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:38:28,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:38:28,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:38:28,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:38:28,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:38:28,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:38:28,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:38:28,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:38:28,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:38:28,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:38:28,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:38:28,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:38:28,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:38:28,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:38:28,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:38:28,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:38:28,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:38:28,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:38:28,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:38:28,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:38:28,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:38:28,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:38:28,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:38:28,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:38:28,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:38:28,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:38:28,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:38:28,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:38:28,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:38:28,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:38:28,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:38:28,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:38:28,275 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 23:38:28,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:38:28,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:38:28,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:38:28,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:38:28,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:38:28,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:38:28,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:38:28,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:38:28,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:38:28,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:38:28,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:38:28,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:38:28,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:38:28,322 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:38:28,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:38:28,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:38:28,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:38:28,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:38:28,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:38:28,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:38:28,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:38:28,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:38:28,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:38:28,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:38:28,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:38:28,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:38:28,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:38:28,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:38:28,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:38:28,325 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 23:38:28,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:38:28,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:38:28,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:38:28,678 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:38:28,679 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:38:28,679 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2020-10-13 23:38:28,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1f7cc36a/827afb3d8f414271ab9a7d1d90651ee3/FLAGa674ddc10 [2020-10-13 23:38:29,188 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:38:29,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2020-10-13 23:38:29,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1f7cc36a/827afb3d8f414271ab9a7d1d90651ee3/FLAGa674ddc10 [2020-10-13 23:38:29,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1f7cc36a/827afb3d8f414271ab9a7d1d90651ee3 [2020-10-13 23:38:29,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:38:29,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:38:29,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:29,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:38:29,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:38:29,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2b9410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29, skipping insertion in model container [2020-10-13 23:38:29,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:38:29,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:38:29,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:29,778 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:38:29,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:29,825 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:38:29,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29 WrapperNode [2020-10-13 23:38:29,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:29,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:38:29,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:38:29,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:38:29,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (1/1) ... [2020-10-13 23:38:29,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:38:29,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:38:29,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:38:29,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:38:29,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (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 23:38:30,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:38:30,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:38:30,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:38:30,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:38:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:38:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:38:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:38:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:38:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:38:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:38:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:38:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:38:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:38:30,276 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:38:30,277 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-13 23:38:30,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:30 BoogieIcfgContainer [2020-10-13 23:38:30,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:38:30,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:38:30,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:38:30,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:38:30,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:38:29" (1/3) ... [2020-10-13 23:38:30,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b06a3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:30, skipping insertion in model container [2020-10-13 23:38:30,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:29" (2/3) ... [2020-10-13 23:38:30,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b06a3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:30, skipping insertion in model container [2020-10-13 23:38:30,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:30" (3/3) ... [2020-10-13 23:38:30,295 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2020-10-13 23:38:30,315 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:38:30,325 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:38:30,356 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:38:30,394 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:38:30,394 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:38:30,394 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:38:30,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:38:30,394 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:38:30,395 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:38:30,395 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:38:30,395 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:38:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 23:38:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:38:30,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:30,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:30,428 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2020-10-13 23:38:30,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:30,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195261820] [2020-10-13 23:38:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:30,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:30,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:30,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:30,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:31,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:38:31,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:38:31,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-13 23:38:31,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:31,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:31,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:31,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:38:31,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:31,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:38:31,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:31,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:31,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:31,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 23:38:31,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:31,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:31,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:31,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:31,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:31,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:38:31,492 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 23:38:31,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195261820] [2020-10-13 23:38:31,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:31,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:38:31,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026160594] [2020-10-13 23:38:31,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:38:31,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:31,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:38:31,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:31,535 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 23:38:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:31,690 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2020-10-13 23:38:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:38:31,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-13 23:38:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:31,707 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:38:31,707 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:38:31,712 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 23:38:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:38:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 23:38:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:38:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-13 23:38:31,782 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2020-10-13 23:38:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:31,782 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-13 23:38:31,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:38:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-13 23:38:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:38:31,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:31,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:31,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:38:31,785 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:31,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1432039210, now seen corresponding path program 1 times [2020-10-13 23:38:31,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:31,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021032883] [2020-10-13 23:38:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:31,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:32,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:32,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:38:32,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:38:32,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-13 23:38:32,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:32,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:32,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:38:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:38:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:38:32,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:38:32,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:32,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:32,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:32,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:32,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:32,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:38:32,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:32,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:32,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 23:38:32,840 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 23:38:32,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021032883] [2020-10-13 23:38:32,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:32,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:38:32,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943948570] [2020-10-13 23:38:32,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:38:32,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:32,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:38:32,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:32,850 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-13 23:38:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:32,987 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-10-13 23:38:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:38:32,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 23:38:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:32,989 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:38:32,990 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:38:32,991 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 23:38:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:38:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:38:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:38:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-13 23:38:33,000 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2020-10-13 23:38:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:33,001 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-13 23:38:33,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:38:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-13 23:38:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:38:33,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:33,002 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 23:38:33,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:38:33,003 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:33,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:33,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2020-10-13 23:38:33,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:33,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369741771] [2020-10-13 23:38:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:33,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:33,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:33,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:33,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:38,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:38:38,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:38:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:38:38,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:38,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:38:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:38:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:38:38,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:38,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:38,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:38,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:38,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:38,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:38:38,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:38,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:38,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:38,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:38,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:38,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:38:38,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369741771] [2020-10-13 23:38:38,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:38,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:38:38,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81860398] [2020-10-13 23:38:38,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:38:38,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:38,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:38:38,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:38,081 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 5 states. [2020-10-13 23:38:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:38,264 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-10-13 23:38:38,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:38:38,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-13 23:38:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:38,265 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:38:38,266 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:38:38,267 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 23:38:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:38:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:38:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:38:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-13 23:38:38,276 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2020-10-13 23:38:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:38,277 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-13 23:38:38,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:38:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-13 23:38:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:38:38,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:38,278 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:38,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:38:38,279 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:38,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2020-10-13 23:38:38,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:38,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385371730] [2020-10-13 23:38:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:43,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:38:43,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:38:43,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:38:43,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:43,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:43,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:38:43,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:43,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:38:43,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:43,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:43,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:43,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:43,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:43,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:43,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:43,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:38:43,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385371730] [2020-10-13 23:38:43,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:43,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:38:43,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842248592] [2020-10-13 23:38:43,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:38:43,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:43,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:38:43,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:38:43,355 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-10-13 23:38:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:43,487 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-10-13 23:38:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:38:43,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-13 23:38:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:43,488 INFO L225 Difference]: With dead ends: 77 [2020-10-13 23:38:43,489 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:38:43,489 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 23:38:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:38:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 23:38:43,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:38:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-13 23:38:43,498 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2020-10-13 23:38:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:43,498 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-13 23:38:43,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:38:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-13 23:38:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:38:43,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:43,500 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:43,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:38:43,501 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2020-10-13 23:38:43,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:43,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600311826] [2020-10-13 23:38:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:43,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:44,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:48,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:48,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:38:48,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:38:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:38:48,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:48,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:38:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:38:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:38:48,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:48,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:48,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:48,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:48,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:48,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:48,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:48,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:48,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:48,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 23:38:48,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600311826] [2020-10-13 23:38:48,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:48,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:38:48,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539990314] [2020-10-13 23:38:48,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:38:48,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:48,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:38:48,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:38:48,569 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 7 states. [2020-10-13 23:38:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:48,723 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-13 23:38:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:38:48,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-13 23:38:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:48,725 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:38:48,725 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:38:48,726 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 23:38:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:38:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 23:38:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:38:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-13 23:38:48,734 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2020-10-13 23:38:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:48,734 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-13 23:38:48,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:38:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-13 23:38:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:38:48,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:48,736 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:48,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:38:48,736 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2020-10-13 23:38:48,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:48,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249304220] [2020-10-13 23:38:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:48,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:48,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:53,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:53,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:38:53,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:38:53,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:53,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:38:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:38:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:38:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:53,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:53,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:53,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:53,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:53,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:53,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:53,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:53,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:53,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:53,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:53,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:53,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 23:38:53,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249304220] [2020-10-13 23:38:53,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:53,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:38:53,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985686797] [2020-10-13 23:38:53,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:38:53,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:53,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:38:53,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:38:53,835 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 8 states. [2020-10-13 23:38:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:54,011 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-13 23:38:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:38:54,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-13 23:38:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:54,013 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:38:54,013 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:38:54,020 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 23:38:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:38:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 23:38:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:38:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-13 23:38:54,027 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2020-10-13 23:38:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:54,027 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-13 23:38:54,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:38:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-13 23:38:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:38:54,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:54,028 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:54,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:38:54,030 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2020-10-13 23:38:54,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:54,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801306443] [2020-10-13 23:38:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:54,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:54,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:54,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:54,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:54,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:59,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:38:59,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:38:59,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:38:59,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:59,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:59,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:38:59,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:38:59,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:38:59,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:59,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:59,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:59,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:59,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:59,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:59,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 23:38:59,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801306443] [2020-10-13 23:38:59,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:59,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:38:59,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387490519] [2020-10-13 23:38:59,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:38:59,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:59,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:38:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:38:59,133 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 9 states. [2020-10-13 23:38:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:59,325 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-13 23:38:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:38:59,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-13 23:38:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:59,327 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:38:59,327 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:38:59,329 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 23:38:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:38:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 23:38:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:38:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-13 23:38:59,337 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2020-10-13 23:38:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:59,337 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-13 23:38:59,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:38:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-13 23:38:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:38:59,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:59,338 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:59,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:38:59,339 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2020-10-13 23:38:59,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:59,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274501342] [2020-10-13 23:38:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:59,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:59,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:04,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:04,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:39:04,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:04,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:39:04,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:04,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:39:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:39:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:39:04,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:04,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:04,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:04,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:04,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:04,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:04,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:04,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:04,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 23:39:04,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274501342] [2020-10-13 23:39:04,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:04,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:39:04,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010491841] [2020-10-13 23:39:04,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:39:04,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:04,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:39:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:39:04,436 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 10 states. [2020-10-13 23:39:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:04,661 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2020-10-13 23:39:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:39:04,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-13 23:39:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:04,664 INFO L225 Difference]: With dead ends: 121 [2020-10-13 23:39:04,664 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:39:04,666 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 23:39:04,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:39:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 23:39:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:39:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-13 23:39:04,674 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2020-10-13 23:39:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:04,674 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-13 23:39:04,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:39:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-13 23:39:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:39:04,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:04,675 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:04,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:39:04,676 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2020-10-13 23:39:04,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:04,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192282401] [2020-10-13 23:39:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:04,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:04,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:04,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:09,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:09,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:39:09,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:39:09,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:09,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:39:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:39:09,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:09,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:09,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:09,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:09,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:09,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:09,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-13 23:39:09,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192282401] [2020-10-13 23:39:09,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:09,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:39:09,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176599052] [2020-10-13 23:39:09,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:39:09,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:09,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:39:09,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:39:09,793 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 11 states. [2020-10-13 23:39:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:09,965 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2020-10-13 23:39:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:39:09,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-13 23:39:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:09,967 INFO L225 Difference]: With dead ends: 132 [2020-10-13 23:39:09,967 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:39:09,968 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 23:39:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:39:09,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 23:39:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:39:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-13 23:39:09,986 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2020-10-13 23:39:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:09,987 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-13 23:39:09,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:39:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-13 23:39:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:39:09,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:09,992 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:09,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:39:09,993 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:09,993 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2020-10-13 23:39:09,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:09,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890910163] [2020-10-13 23:39:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:15,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:15,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:39:15,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:15,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:39:15,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:15,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:15,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:39:15,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:39:15,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:39:15,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:15,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:15,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:15,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:15,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:15,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:15,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:15,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:15,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:15,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:15,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:15,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:15,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-13 23:39:15,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890910163] [2020-10-13 23:39:15,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:15,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:39:15,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758534481] [2020-10-13 23:39:15,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:39:15,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:39:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:15,144 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-13 23:39:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:15,349 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2020-10-13 23:39:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:39:15,349 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-13 23:39:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:15,350 INFO L225 Difference]: With dead ends: 143 [2020-10-13 23:39:15,350 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:39:15,351 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 23:39:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:39:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 23:39:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:39:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-13 23:39:15,360 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2020-10-13 23:39:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:15,360 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-13 23:39:15,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:39:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-13 23:39:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:39:15,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:15,362 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:15,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:39:15,362 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2020-10-13 23:39:15,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:15,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706039673] [2020-10-13 23:39:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:15,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:15,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:15,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:20,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:20,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:39:20,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:20,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:39:20,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:20,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:20,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:39:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:39:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:39:20,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:20,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:20,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:20,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:20,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:20,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:20,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:20,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:20,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:20,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:20,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:20,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:20,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 23:39:20,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706039673] [2020-10-13 23:39:20,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:20,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:39:20,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333202346] [2020-10-13 23:39:20,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:39:20,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:20,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:39:20,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:20,514 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 13 states. [2020-10-13 23:39:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:20,731 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-10-13 23:39:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:39:20,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-10-13 23:39:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:20,732 INFO L225 Difference]: With dead ends: 154 [2020-10-13 23:39:20,732 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:39:20,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:39:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 23:39:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:39:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-10-13 23:39:20,741 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2020-10-13 23:39:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:20,741 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-10-13 23:39:20,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:39:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-10-13 23:39:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:39:20,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:20,743 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:20,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:39:20,743 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:20,744 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2020-10-13 23:39:20,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:20,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856329138] [2020-10-13 23:39:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:20,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:20,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:20,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:20,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:25,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:39:25,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:25,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:39:25,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:25,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:25,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:39:25,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:39:25,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:39:25,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:25,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:25,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:25,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:25,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:25,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:25,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:25,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:25,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:25,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:25,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:25,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:25,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-13 23:39:25,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856329138] [2020-10-13 23:39:25,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:25,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:39:25,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964958167] [2020-10-13 23:39:25,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:39:25,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:25,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:39:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:25,890 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 14 states. [2020-10-13 23:39:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:26,103 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2020-10-13 23:39:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:39:26,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-13 23:39:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:26,105 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:39:26,105 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:39:26,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:39:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-13 23:39:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:39:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-10-13 23:39:26,114 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2020-10-13 23:39:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:26,114 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-10-13 23:39:26,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:39:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-10-13 23:39:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:39:26,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:26,116 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:26,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:39:26,116 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2020-10-13 23:39:26,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:26,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576297438] [2020-10-13 23:39:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:26,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:26,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:26,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:27,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:31,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:39:31,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:31,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:31,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:31,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:31,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:31,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:31,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:31,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:31,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:31,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:31,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 23:39:31,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576297438] [2020-10-13 23:39:31,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:31,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:39:31,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119112117] [2020-10-13 23:39:31,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:39:31,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:39:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:39:31,267 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 15 states. [2020-10-13 23:39:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:31,584 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2020-10-13 23:39:31,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:39:31,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-10-13 23:39:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:31,587 INFO L225 Difference]: With dead ends: 176 [2020-10-13 23:39:31,587 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 23:39:31,588 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 23:39:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 23:39:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 23:39:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:39:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-13 23:39:31,612 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 89 [2020-10-13 23:39:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:31,612 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-13 23:39:31,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:39:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-13 23:39:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:39:31,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:31,617 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:31,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:39:31,617 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:31,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2080107158, now seen corresponding path program 12 times [2020-10-13 23:39:31,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:31,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373143427] [2020-10-13 23:39:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:31,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:31,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:31,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:36,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:39:36,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:36,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:39:36,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:36,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:36,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:39:36,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:39:36,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:39:36,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:36,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:36,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:36,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:36,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:36,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:36,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:36,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:36,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-13 23:39:36,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373143427] [2020-10-13 23:39:36,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:36,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:39:36,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397310394] [2020-10-13 23:39:36,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:39:36,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:36,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:39:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:39:36,832 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 16 states. [2020-10-13 23:39:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:37,111 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2020-10-13 23:39:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:39:37,112 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-10-13 23:39:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:37,113 INFO L225 Difference]: With dead ends: 187 [2020-10-13 23:39:37,114 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:39:37,115 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 23:39:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:39:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 23:39:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:39:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-13 23:39:37,142 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 95 [2020-10-13 23:39:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:37,143 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-13 23:39:37,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:39:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-13 23:39:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:39:37,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:37,148 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:37,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:39:37,149 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:37,149 INFO L82 PathProgramCache]: Analyzing trace with hash -332398029, now seen corresponding path program 13 times [2020-10-13 23:39:37,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:37,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346829060] [2020-10-13 23:39:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:37,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:37,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:42,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:42,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:39:42,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:42,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:39:42,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:42,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:42,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:39:42,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 23:39:42,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:39:42,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:42,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:42,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:42,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:42,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:42,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:42,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:42,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:42,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-10-13 23:39:42,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346829060] [2020-10-13 23:39:42,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:42,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:39:42,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076882656] [2020-10-13 23:39:42,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:39:42,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:39:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:39:42,345 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 17 states. [2020-10-13 23:39:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:42,623 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2020-10-13 23:39:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:39:42,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-10-13 23:39:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:42,624 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:39:42,624 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:39:42,625 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 23:39:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:39:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-13 23:39:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:39:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2020-10-13 23:39:42,632 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 101 [2020-10-13 23:39:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:42,632 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2020-10-13 23:39:42,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:39:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2020-10-13 23:39:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:39:42,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:42,634 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:42,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:39:42,634 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash -904878026, now seen corresponding path program 14 times [2020-10-13 23:39:42,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:42,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962507357] [2020-10-13 23:39:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:42,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:42,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:42,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:47,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:39:47,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:47,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:39:47,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:47,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:47,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:39:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:39:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:39:47,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:47,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:47,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:47,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:47,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:47,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:47,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:47,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:47,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:47,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:47,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:47,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:47,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-13 23:39:47,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962507357] [2020-10-13 23:39:47,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:47,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:39:47,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850128839] [2020-10-13 23:39:47,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:39:47,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:47,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:39:47,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:39:47,844 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 18 states. [2020-10-13 23:39:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:48,113 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2020-10-13 23:39:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:39:48,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2020-10-13 23:39:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:48,115 INFO L225 Difference]: With dead ends: 209 [2020-10-13 23:39:48,115 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 23:39:48,116 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 23:39:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 23:39:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-13 23:39:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:39:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-10-13 23:39:48,123 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 107 [2020-10-13 23:39:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:48,124 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-10-13 23:39:48,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:39:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-10-13 23:39:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 23:39:48,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:48,125 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:48,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:39:48,126 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2139869677, now seen corresponding path program 15 times [2020-10-13 23:39:48,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:48,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726923042] [2020-10-13 23:39:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:48,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:48,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:48,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:53,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:53,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 23:39:53,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:39:53,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:39:53,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:53,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:39:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:39:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:39:53,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:53,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:53,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:53,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:53,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:53,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:53,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:53,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:53,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 23:39:53,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726923042] [2020-10-13 23:39:53,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:53,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:39:53,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579173796] [2020-10-13 23:39:53,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:39:53,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:53,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:39:53,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:39:53,346 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 19 states. [2020-10-13 23:39:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:53,585 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2020-10-13 23:39:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:39:53,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 113 [2020-10-13 23:39:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:53,587 INFO L225 Difference]: With dead ends: 220 [2020-10-13 23:39:53,587 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:39:53,588 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 23:39:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:39:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 23:39:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:39:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2020-10-13 23:39:53,596 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 113 [2020-10-13 23:39:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:53,597 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2020-10-13 23:39:53,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:39:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2020-10-13 23:39:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:39:53,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:53,599 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:53,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:39:53,599 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash -243049002, now seen corresponding path program 16 times [2020-10-13 23:39:53,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:53,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490399598] [2020-10-13 23:39:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:53,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:53,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:53,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:39:58,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:58,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:58,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:58,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:58,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:58,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:58,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:39:58,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:58,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:58,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-10-13 23:39:58,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490399598] [2020-10-13 23:39:58,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:58,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:39:58,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051914683] [2020-10-13 23:39:58,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:39:58,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:39:58,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:39:58,878 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand 20 states. [2020-10-13 23:39:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:59,148 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2020-10-13 23:39:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:39:59,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-10-13 23:39:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:59,149 INFO L225 Difference]: With dead ends: 231 [2020-10-13 23:39:59,150 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:39:59,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:39:59,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:39:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-13 23:39:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:39:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2020-10-13 23:39:59,157 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 119 [2020-10-13 23:39:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:59,157 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2020-10-13 23:39:59,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:39:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2020-10-13 23:39:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:39:59,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:59,159 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:59,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:39:59,159 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:59,160 INFO L82 PathProgramCache]: Analyzing trace with hash 767435251, now seen corresponding path program 17 times [2020-10-13 23:39:59,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:59,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978424193] [2020-10-13 23:39:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:59,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:59,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:04,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 23:40:04,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:04,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:40:04,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:04,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:04,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:40:04,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:04,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:40:04,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:04,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:04,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:04,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:04,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:04,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:04,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:04,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:04,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-13 23:40:04,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978424193] [2020-10-13 23:40:04,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:04,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:40:04,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745059273] [2020-10-13 23:40:04,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:40:04,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:04,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:40:04,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:40:04,427 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand 21 states. [2020-10-13 23:40:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:04,726 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2020-10-13 23:40:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:40:04,726 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-10-13 23:40:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:04,728 INFO L225 Difference]: With dead ends: 242 [2020-10-13 23:40:04,728 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:40:04,729 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 23:40:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:40:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 23:40:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:40:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2020-10-13 23:40:04,737 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 125 [2020-10-13 23:40:04,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:04,737 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2020-10-13 23:40:04,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:40:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2020-10-13 23:40:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:40:04,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:04,739 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:04,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:40:04,739 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2123232394, now seen corresponding path program 18 times [2020-10-13 23:40:04,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:04,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871460974] [2020-10-13 23:40:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:04,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:04,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:09,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:40:09,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:09,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:40:09,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:09,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:09,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:40:09,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:40:09,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:40:09,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:10,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:10,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:10,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:10,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:10,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:10,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:10,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:10,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:10,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-13 23:40:10,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871460974] [2020-10-13 23:40:10,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:10,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:40:10,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968014227] [2020-10-13 23:40:10,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:40:10,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:40:10,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:40:10,014 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 22 states. [2020-10-13 23:40:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:10,303 INFO L93 Difference]: Finished difference Result 253 states and 270 transitions. [2020-10-13 23:40:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:40:10,303 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2020-10-13 23:40:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:10,304 INFO L225 Difference]: With dead ends: 253 [2020-10-13 23:40:10,304 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:40:10,305 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 23:40:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:40:10,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 23:40:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:40:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2020-10-13 23:40:10,312 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 131 [2020-10-13 23:40:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:10,313 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2020-10-13 23:40:10,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:40:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2020-10-13 23:40:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:40:10,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:10,314 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:10,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:40:10,315 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash -87040557, now seen corresponding path program 19 times [2020-10-13 23:40:10,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:10,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730885200] [2020-10-13 23:40:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:10,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:10,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:10,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:10,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:15,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:40:15,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:40:15,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:15,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:40:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:40:15,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:15,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:15,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:15,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:15,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:15,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:15,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:15,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-13 23:40:15,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730885200] [2020-10-13 23:40:15,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:15,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:40:15,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275998228] [2020-10-13 23:40:15,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:40:15,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:15,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:40:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:40:15,626 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 23 states. [2020-10-13 23:40:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:15,949 INFO L93 Difference]: Finished difference Result 264 states and 281 transitions. [2020-10-13 23:40:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:40:15,949 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2020-10-13 23:40:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:15,950 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:40:15,950 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 23:40:15,952 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 23:40:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 23:40:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-13 23:40:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 23:40:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 154 transitions. [2020-10-13 23:40:15,958 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 154 transitions. Word has length 137 [2020-10-13 23:40:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:15,959 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 154 transitions. [2020-10-13 23:40:15,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:40:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 154 transitions. [2020-10-13 23:40:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 23:40:15,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:15,960 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:15,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:40:15,961 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1786425622, now seen corresponding path program 20 times [2020-10-13 23:40:15,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:15,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530492031] [2020-10-13 23:40:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:15,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:16,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:16,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:16,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:20,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 23:40:20,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:40:20,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:20,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:40:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:40:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:40:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:21,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:21,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:21,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:21,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:21,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:21,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:21,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:21,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-10-13 23:40:21,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530492031] [2020-10-13 23:40:21,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:21,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:40:21,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948224813] [2020-10-13 23:40:21,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:40:21,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:21,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:40:21,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:40:21,304 INFO L87 Difference]: Start difference. First operand 148 states and 154 transitions. Second operand 24 states. [2020-10-13 23:40:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:21,659 INFO L93 Difference]: Finished difference Result 275 states and 292 transitions. [2020-10-13 23:40:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:40:21,662 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-10-13 23:40:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:21,663 INFO L225 Difference]: With dead ends: 275 [2020-10-13 23:40:21,664 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:40:21,665 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 23:40:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:40:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-13 23:40:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 23:40:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2020-10-13 23:40:21,671 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 143 [2020-10-13 23:40:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:21,672 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2020-10-13 23:40:21,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:40:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2020-10-13 23:40:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 23:40:21,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:21,674 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:21,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:40:21,674 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1930731085, now seen corresponding path program 21 times [2020-10-13 23:40:21,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:21,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105981739] [2020-10-13 23:40:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:21,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:21,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:21,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:21,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:26,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 23:40:26,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:26,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:40:26,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:26,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:40:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-13 23:40:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:40:26,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:27,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:27,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:27,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:27,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:27,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:27,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:27,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:27,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:27,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:27,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-13 23:40:27,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105981739] [2020-10-13 23:40:27,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:27,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:40:27,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926985673] [2020-10-13 23:40:27,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:40:27,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:40:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:27,045 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 25 states. [2020-10-13 23:40:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:27,440 INFO L93 Difference]: Finished difference Result 286 states and 303 transitions. [2020-10-13 23:40:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:40:27,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 149 [2020-10-13 23:40:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:27,442 INFO L225 Difference]: With dead ends: 286 [2020-10-13 23:40:27,442 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:40:27,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:40:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 23:40:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 23:40:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2020-10-13 23:40:27,449 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 149 [2020-10-13 23:40:27,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:27,449 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2020-10-13 23:40:27,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:40:27,449 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2020-10-13 23:40:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 23:40:27,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:27,451 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:27,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:40:27,451 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:27,451 INFO L82 PathProgramCache]: Analyzing trace with hash -558149962, now seen corresponding path program 22 times [2020-10-13 23:40:27,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:27,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469183080] [2020-10-13 23:40:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:27,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:27,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:27,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:32,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 23:40:32,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:32,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:40:32,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:32,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:32,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:40:32,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 23:40:32,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:40:32,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:32,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:32,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:32,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:32,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:32,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:32,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:32,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-13 23:40:32,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469183080] [2020-10-13 23:40:32,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:32,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:40:32,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529301967] [2020-10-13 23:40:32,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:40:32,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:40:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:32,848 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 26 states. [2020-10-13 23:40:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:33,194 INFO L93 Difference]: Finished difference Result 297 states and 314 transitions. [2020-10-13 23:40:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:40:33,200 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 155 [2020-10-13 23:40:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:33,201 INFO L225 Difference]: With dead ends: 297 [2020-10-13 23:40:33,201 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 23:40:33,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 23:40:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-13 23:40:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 23:40:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2020-10-13 23:40:33,209 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 155 [2020-10-13 23:40:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:33,210 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2020-10-13 23:40:33,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:40:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2020-10-13 23:40:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 23:40:33,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:33,211 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:33,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:40:33,215 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1204989331, now seen corresponding path program 23 times [2020-10-13 23:40:33,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:33,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756749244] [2020-10-13 23:40:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:33,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:33,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:33,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:38,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 23:40:38,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:38,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:40:38,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:38,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:38,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:40:38,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:40:38,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:40:38,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:38,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:38,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:38,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:38,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:38,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:38,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:38,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:38,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2020-10-13 23:40:38,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756749244] [2020-10-13 23:40:38,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:38,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:40:38,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145145004] [2020-10-13 23:40:38,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:40:38,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:38,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:40:38,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:40:38,648 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 27 states. [2020-10-13 23:40:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:39,072 INFO L93 Difference]: Finished difference Result 308 states and 325 transitions. [2020-10-13 23:40:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:40:39,072 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 161 [2020-10-13 23:40:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:39,073 INFO L225 Difference]: With dead ends: 308 [2020-10-13 23:40:39,073 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 23:40:39,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:40:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 23:40:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-13 23:40:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 23:40:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2020-10-13 23:40:39,082 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 161 [2020-10-13 23:40:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:39,082 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2020-10-13 23:40:39,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:40:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2020-10-13 23:40:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:40:39,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:39,084 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:39,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:40:39,084 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash 835839062, now seen corresponding path program 24 times [2020-10-13 23:40:39,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:39,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436198007] [2020-10-13 23:40:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:39,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:39,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:39,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:39,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:44,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 23:40:44,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:44,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:40:44,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:44,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:40:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:40:44,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:44,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:44,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:44,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:44,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:44,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:44,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:44,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:44,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:44,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:44,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:44,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2020-10-13 23:40:44,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436198007] [2020-10-13 23:40:44,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:44,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:40:44,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309228516] [2020-10-13 23:40:44,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:40:44,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:44,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:40:44,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:40:44,550 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 28 states. [2020-10-13 23:40:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:44,923 INFO L93 Difference]: Finished difference Result 319 states and 336 transitions. [2020-10-13 23:40:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:40:44,924 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 167 [2020-10-13 23:40:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:44,925 INFO L225 Difference]: With dead ends: 319 [2020-10-13 23:40:44,925 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 23:40:44,926 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 23:40:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 23:40:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-13 23:40:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:40:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2020-10-13 23:40:44,934 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 167 [2020-10-13 23:40:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:44,934 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2020-10-13 23:40:44,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:40:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2020-10-13 23:40:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 23:40:44,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:44,936 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:44,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:40:44,936 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1841807731, now seen corresponding path program 25 times [2020-10-13 23:40:44,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:44,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278912825] [2020-10-13 23:40:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:44,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:45,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:45,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:45,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:49,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:49,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 23:40:49,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:49,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 23:40:49,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:49,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:49,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:40:49,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:40:49,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:40:49,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:50,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:50,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:50,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:50,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:50,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:50,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:50,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:50,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:50,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:50,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:40:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2020-10-13 23:40:50,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278912825] [2020-10-13 23:40:50,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:50,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:40:50,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548886668] [2020-10-13 23:40:50,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:40:50,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:40:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:40:50,560 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand 29 states. [2020-10-13 23:40:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:51,082 INFO L93 Difference]: Finished difference Result 330 states and 347 transitions. [2020-10-13 23:40:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:40:51,083 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2020-10-13 23:40:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:51,084 INFO L225 Difference]: With dead ends: 330 [2020-10-13 23:40:51,084 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 23:40:51,085 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 23:40:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 23:40:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-13 23:40:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 23:40:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2020-10-13 23:40:51,093 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 173 [2020-10-13 23:40:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:51,093 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2020-10-13 23:40:51,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:40:51,093 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2020-10-13 23:40:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 23:40:51,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:51,095 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:51,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:40:51,095 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1193512458, now seen corresponding path program 26 times [2020-10-13 23:40:51,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:51,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546823723] [2020-10-13 23:40:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:51,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:51,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:51,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:51,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:56,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 23:40:56,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:40:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:40:56,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:56,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:40:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:40:56,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:56,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:56,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:56,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:56,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:40:56,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:56,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:56,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:40:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2020-10-13 23:40:56,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546823723] [2020-10-13 23:40:56,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:56,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:40:56,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435250683] [2020-10-13 23:40:56,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:40:56,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:56,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:40:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:40:56,710 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand 30 states. [2020-10-13 23:40:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:57,221 INFO L93 Difference]: Finished difference Result 341 states and 358 transitions. [2020-10-13 23:40:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:40:57,221 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 179 [2020-10-13 23:40:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:57,224 INFO L225 Difference]: With dead ends: 341 [2020-10-13 23:40:57,224 INFO L226 Difference]: Without dead ends: 190 [2020-10-13 23:40:57,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:40:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-13 23:40:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-13 23:40:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 23:40:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 196 transitions. [2020-10-13 23:40:57,234 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 196 transitions. Word has length 179 [2020-10-13 23:40:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:57,234 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 196 transitions. [2020-10-13 23:40:57,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:40:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 196 transitions. [2020-10-13 23:40:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 23:40:57,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:57,236 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:57,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:40:57,236 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1066179923, now seen corresponding path program 27 times [2020-10-13 23:40:57,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:57,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415942185] [2020-10-13 23:40:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:57,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:02,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 23:41:02,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:02,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:41:02,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:02,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:41:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 23:41:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:41:02,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:02,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:02,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:02,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:02,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:02,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:02,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:02,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:02,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-13 23:41:02,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415942185] [2020-10-13 23:41:02,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:02,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:41:02,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915551856] [2020-10-13 23:41:02,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:41:02,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:41:02,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:41:02,826 INFO L87 Difference]: Start difference. First operand 190 states and 196 transitions. Second operand 31 states. [2020-10-13 23:41:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:03,326 INFO L93 Difference]: Finished difference Result 352 states and 369 transitions. [2020-10-13 23:41:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:41:03,327 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 185 [2020-10-13 23:41:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:03,328 INFO L225 Difference]: With dead ends: 352 [2020-10-13 23:41:03,328 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:41:03,329 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 23:41:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:41:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-13 23:41:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 23:41:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2020-10-13 23:41:03,350 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 185 [2020-10-13 23:41:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:03,351 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2020-10-13 23:41:03,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:41:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2020-10-13 23:41:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 23:41:03,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:03,356 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:03,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:41:03,357 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1434912874, now seen corresponding path program 28 times [2020-10-13 23:41:03,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:03,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131092698] [2020-10-13 23:41:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:03,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:03,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:03,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:04,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:08,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:08,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 23:41:08,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:41:08,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:08,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:41:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:41:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:41:08,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:08,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:08,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:08,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:08,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:08,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:08,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:08,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:08,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:08,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:08,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-13 23:41:08,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131092698] [2020-10-13 23:41:08,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:08,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:41:08,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353896607] [2020-10-13 23:41:08,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:41:08,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:41:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:41:08,971 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand 32 states. [2020-10-13 23:41:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:09,461 INFO L93 Difference]: Finished difference Result 363 states and 380 transitions. [2020-10-13 23:41:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:41:09,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 191 [2020-10-13 23:41:09,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:09,464 INFO L225 Difference]: With dead ends: 363 [2020-10-13 23:41:09,464 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 23:41:09,466 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 23:41:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 23:41:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-13 23:41:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:41:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 208 transitions. [2020-10-13 23:41:09,477 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 208 transitions. Word has length 191 [2020-10-13 23:41:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:09,477 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 208 transitions. [2020-10-13 23:41:09,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:41:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 208 transitions. [2020-10-13 23:41:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:41:09,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:09,479 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:09,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:41:09,480 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash 476266803, now seen corresponding path program 29 times [2020-10-13 23:41:09,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:09,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344335381] [2020-10-13 23:41:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:09,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:09,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:10,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:10,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:14,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:14,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:41:14,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 23:41:14,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:14,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:41:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 23:41:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:41:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:15,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:15,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:15,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:15,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:15,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:15,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:15,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2020-10-13 23:41:15,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344335381] [2020-10-13 23:41:15,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:15,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:41:15,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669705019] [2020-10-13 23:41:15,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:41:15,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:15,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:41:15,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:15,112 INFO L87 Difference]: Start difference. First operand 202 states and 208 transitions. Second operand 33 states. [2020-10-13 23:41:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:15,645 INFO L93 Difference]: Finished difference Result 374 states and 391 transitions. [2020-10-13 23:41:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:41:15,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 197 [2020-10-13 23:41:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:15,647 INFO L225 Difference]: With dead ends: 374 [2020-10-13 23:41:15,647 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 23:41:15,648 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 23:41:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 23:41:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-13 23:41:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 23:41:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2020-10-13 23:41:15,655 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 197 [2020-10-13 23:41:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:15,656 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2020-10-13 23:41:15,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:41:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2020-10-13 23:41:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-13 23:41:15,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:15,657 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:15,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:41:15,658 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:15,658 INFO L82 PathProgramCache]: Analyzing trace with hash -20613834, now seen corresponding path program 30 times [2020-10-13 23:41:15,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:15,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643209546] [2020-10-13 23:41:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:15,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:20,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:20,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-13 23:41:20,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:20,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:41:20,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:20,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:20,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:41:20,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 23:41:20,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:41:20,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:21,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:21,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:21,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:21,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:21,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:21,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:21,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:21,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:21,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:21,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:21,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2020-10-13 23:41:21,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643209546] [2020-10-13 23:41:21,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:21,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:41:21,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153752119] [2020-10-13 23:41:21,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:41:21,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:21,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:41:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:41:21,284 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand 34 states. [2020-10-13 23:41:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:21,810 INFO L93 Difference]: Finished difference Result 385 states and 402 transitions. [2020-10-13 23:41:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:41:21,811 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 203 [2020-10-13 23:41:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:21,813 INFO L225 Difference]: With dead ends: 385 [2020-10-13 23:41:21,813 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 23:41:21,814 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 23:41:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 23:41:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-13 23:41:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 23:41:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 220 transitions. [2020-10-13 23:41:21,822 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 220 transitions. Word has length 203 [2020-10-13 23:41:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:21,822 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 220 transitions. [2020-10-13 23:41:21,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:41:21,822 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 220 transitions. [2020-10-13 23:41:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 23:41:21,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:21,824 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:21,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:41:21,824 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1576162029, now seen corresponding path program 31 times [2020-10-13 23:41:21,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:21,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654383748] [2020-10-13 23:41:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:21,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:22,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:26,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:26,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 23:41:26,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:26,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 23:41:26,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:26,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:41:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:41:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:27,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:27,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:27,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:27,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:27,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:27,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:27,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:27,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:27,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:27,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:27,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-10-13 23:41:27,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654383748] [2020-10-13 23:41:27,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:27,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:41:27,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557996997] [2020-10-13 23:41:27,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:41:27,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:27,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:41:27,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:41:27,516 INFO L87 Difference]: Start difference. First operand 214 states and 220 transitions. Second operand 35 states. [2020-10-13 23:41:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:27,999 INFO L93 Difference]: Finished difference Result 396 states and 413 transitions. [2020-10-13 23:41:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:41:27,999 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 209 [2020-10-13 23:41:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:28,002 INFO L225 Difference]: With dead ends: 396 [2020-10-13 23:41:28,002 INFO L226 Difference]: Without dead ends: 220 [2020-10-13 23:41:28,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:41:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-13 23:41:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-10-13 23:41:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 23:41:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2020-10-13 23:41:28,012 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 209 [2020-10-13 23:41:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:28,013 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2020-10-13 23:41:28,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:41:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2020-10-13 23:41:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-13 23:41:28,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:28,014 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:28,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:41:28,015 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:28,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1331686102, now seen corresponding path program 32 times [2020-10-13 23:41:28,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:28,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244149467] [2020-10-13 23:41:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:28,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:28,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:28,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:28,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:33,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:33,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-13 23:41:33,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:33,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:41:33,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:33,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:41:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 23:41:33,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:41:33,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:33,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:33,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:33,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:33,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:33,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:33,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:33,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-13 23:41:33,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244149467] [2020-10-13 23:41:33,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:33,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:41:33,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470060353] [2020-10-13 23:41:33,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:41:33,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:33,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:41:33,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:41:33,752 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand 36 states. [2020-10-13 23:41:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:34,298 INFO L93 Difference]: Finished difference Result 407 states and 424 transitions. [2020-10-13 23:41:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:41:34,299 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 215 [2020-10-13 23:41:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:34,300 INFO L225 Difference]: With dead ends: 407 [2020-10-13 23:41:34,300 INFO L226 Difference]: Without dead ends: 226 [2020-10-13 23:41:34,302 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 23:41:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-13 23:41:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-13 23:41:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 23:41:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 232 transitions. [2020-10-13 23:41:34,310 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 232 transitions. Word has length 215 [2020-10-13 23:41:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:34,310 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 232 transitions. [2020-10-13 23:41:34,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:41:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 232 transitions. [2020-10-13 23:41:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-13 23:41:34,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:34,312 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:34,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:41:34,312 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash -858922765, now seen corresponding path program 33 times [2020-10-13 23:41:34,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:34,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45294419] [2020-10-13 23:41:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:39,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:39,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 23:41:39,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:39,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 23:41:39,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:39,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:41:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 23:41:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:41:39,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:40,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:40,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:40,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:40,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:40,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:40,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:40,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:40,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:40,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:40,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:40,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:40,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2020-10-13 23:41:40,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45294419] [2020-10-13 23:41:40,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:40,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:41:40,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525950934] [2020-10-13 23:41:40,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:41:40,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:40,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:41:40,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:41:40,077 INFO L87 Difference]: Start difference. First operand 226 states and 232 transitions. Second operand 37 states. [2020-10-13 23:41:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:40,564 INFO L93 Difference]: Finished difference Result 418 states and 435 transitions. [2020-10-13 23:41:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:41:40,565 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 221 [2020-10-13 23:41:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:40,566 INFO L225 Difference]: With dead ends: 418 [2020-10-13 23:41:40,567 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 23:41:40,568 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 23:41:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 23:41:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-13 23:41:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:41:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2020-10-13 23:41:40,575 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 221 [2020-10-13 23:41:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:40,575 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2020-10-13 23:41:40,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:41:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2020-10-13 23:41:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:41:40,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:40,577 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:40,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:41:40,578 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:40,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1218029450, now seen corresponding path program 34 times [2020-10-13 23:41:40,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:40,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657609942] [2020-10-13 23:41:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:40,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:41,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:41,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:45,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:45,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 23:41:45,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:45,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 23:41:45,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:45,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:45,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:41:45,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:45,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:41:45,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:46,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:46,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:46,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:46,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:46,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:46,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:46,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:46,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:46,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2975 trivial. 0 not checked. [2020-10-13 23:41:46,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657609942] [2020-10-13 23:41:46,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:46,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:41:46,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643985515] [2020-10-13 23:41:46,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:41:46,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:46,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:41:46,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:41:46,393 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand 38 states. [2020-10-13 23:41:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:46,980 INFO L93 Difference]: Finished difference Result 429 states and 446 transitions. [2020-10-13 23:41:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:41:46,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 227 [2020-10-13 23:41:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:46,982 INFO L225 Difference]: With dead ends: 429 [2020-10-13 23:41:46,982 INFO L226 Difference]: Without dead ends: 238 [2020-10-13 23:41:46,983 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 23:41:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-13 23:41:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2020-10-13 23:41:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-13 23:41:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 244 transitions. [2020-10-13 23:41:46,990 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 244 transitions. Word has length 227 [2020-10-13 23:41:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:46,990 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 244 transitions. [2020-10-13 23:41:46,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:41:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 244 transitions. [2020-10-13 23:41:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-13 23:41:46,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:46,992 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:46,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:41:46,992 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash 392551635, now seen corresponding path program 35 times [2020-10-13 23:41:46,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:46,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429656914] [2020-10-13 23:41:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:47,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:52,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:52,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-13 23:41:52,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 23:41:52,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:52,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:41:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 23:41:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:41:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:52,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:52,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:52,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:52,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:52,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:52,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:52,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:52,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:52,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3150 trivial. 0 not checked. [2020-10-13 23:41:52,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429656914] [2020-10-13 23:41:52,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:52,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:41:52,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747203399] [2020-10-13 23:41:52,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:41:52,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:41:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:41:52,843 INFO L87 Difference]: Start difference. First operand 238 states and 244 transitions. Second operand 39 states. [2020-10-13 23:41:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:53,403 INFO L93 Difference]: Finished difference Result 440 states and 457 transitions. [2020-10-13 23:41:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:41:53,404 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 233 [2020-10-13 23:41:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:53,406 INFO L225 Difference]: With dead ends: 440 [2020-10-13 23:41:53,406 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 23:41:53,407 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 23:41:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 23:41:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-10-13 23:41:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 23:41:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2020-10-13 23:41:53,414 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 233 [2020-10-13 23:41:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:53,414 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2020-10-13 23:41:53,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:41:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2020-10-13 23:41:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-13 23:41:53,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:53,416 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:53,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:41:53,416 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:53,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1284063722, now seen corresponding path program 36 times [2020-10-13 23:41:53,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:53,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242982531] [2020-10-13 23:41:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:53,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:53,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:53,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:53,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:58,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:58,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-13 23:41:58,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:41:58,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 23:41:58,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:58,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:58,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:41:58,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-13 23:41:58,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:41:58,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:59,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:59,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:59,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:59,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:59,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:59,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3996 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2020-10-13 23:41:59,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242982531] [2020-10-13 23:41:59,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:59,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:41:59,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44623171] [2020-10-13 23:41:59,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:41:59,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:41:59,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:41:59,307 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand 40 states. [2020-10-13 23:41:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:59,969 INFO L93 Difference]: Finished difference Result 451 states and 468 transitions. [2020-10-13 23:41:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:41:59,970 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 239 [2020-10-13 23:41:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:59,972 INFO L225 Difference]: With dead ends: 451 [2020-10-13 23:41:59,972 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 23:41:59,973 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 23:41:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 23:41:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-13 23:41:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 23:41:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 256 transitions. [2020-10-13 23:41:59,981 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 256 transitions. Word has length 239 [2020-10-13 23:41:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:59,981 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 256 transitions. [2020-10-13 23:41:59,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:41:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 256 transitions. [2020-10-13 23:41:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 23:41:59,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:59,983 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:59,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:41:59,983 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:59,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1692950349, now seen corresponding path program 37 times [2020-10-13 23:41:59,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:59,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169012660] [2020-10-13 23:41:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:00,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:00,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:00,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:00,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:05,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:05,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-13 23:42:05,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:05,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:42:05,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:05,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:05,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:42:05,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-13 23:42:05,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:42:05,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:05,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:05,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:05,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:05,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:05,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:05,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:05,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:05,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-10-13 23:42:05,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169012660] [2020-10-13 23:42:05,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:05,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:42:05,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695930616] [2020-10-13 23:42:05,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:42:05,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:05,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:42:05,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:42:05,898 INFO L87 Difference]: Start difference. First operand 250 states and 256 transitions. Second operand 41 states. [2020-10-13 23:42:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:06,571 INFO L93 Difference]: Finished difference Result 462 states and 479 transitions. [2020-10-13 23:42:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:42:06,572 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 245 [2020-10-13 23:42:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:06,574 INFO L225 Difference]: With dead ends: 462 [2020-10-13 23:42:06,574 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 23:42:06,576 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 23:42:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 23:42:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-13 23:42:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 23:42:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 262 transitions. [2020-10-13 23:42:06,583 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 262 transitions. Word has length 245 [2020-10-13 23:42:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:06,583 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 262 transitions. [2020-10-13 23:42:06,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:42:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 262 transitions. [2020-10-13 23:42:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-13 23:42:06,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:06,585 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:42:06,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:42:06,585 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash 28253110, now seen corresponding path program 38 times [2020-10-13 23:42:06,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:06,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540354807] [2020-10-13 23:42:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:06,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:06,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:11,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:11,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-13 23:42:11,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:11,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-13 23:42:11,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:11,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:11,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:42:11,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-13 23:42:11,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:42:11,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:12,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:12,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:12,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:12,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:12,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:12,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:12,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:12,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:12,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:12,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2020-10-13 23:42:12,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540354807] [2020-10-13 23:42:12,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:12,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:42:12,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638334115] [2020-10-13 23:42:12,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:42:12,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:42:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:42:12,614 INFO L87 Difference]: Start difference. First operand 256 states and 262 transitions. Second operand 42 states. [2020-10-13 23:42:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:13,323 INFO L93 Difference]: Finished difference Result 473 states and 490 transitions. [2020-10-13 23:42:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:42:13,324 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 251 [2020-10-13 23:42:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:13,326 INFO L225 Difference]: With dead ends: 473 [2020-10-13 23:42:13,326 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 23:42:13,328 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 23:42:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 23:42:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-10-13 23:42:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 23:42:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 268 transitions. [2020-10-13 23:42:13,335 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 268 transitions. Word has length 251 [2020-10-13 23:42:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:13,335 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 268 transitions. [2020-10-13 23:42:13,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:42:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 268 transitions. [2020-10-13 23:42:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-13 23:42:13,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:13,337 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:42:13,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:42:13,337 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash 799354003, now seen corresponding path program 39 times [2020-10-13 23:42:13,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:13,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146928497] [2020-10-13 23:42:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:13,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:18,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:18,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-13 23:42:18,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:18,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 23:42:18,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:18,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:42:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:42:18,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:19,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:19,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:19,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:19,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:19,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:19,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:19,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:19,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4680 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3900 trivial. 0 not checked. [2020-10-13 23:42:19,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146928497] [2020-10-13 23:42:19,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:19,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:42:19,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310996501] [2020-10-13 23:42:19,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:42:19,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:19,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:42:19,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:42:19,373 INFO L87 Difference]: Start difference. First operand 262 states and 268 transitions. Second operand 43 states. [2020-10-13 23:42:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:19,945 INFO L93 Difference]: Finished difference Result 484 states and 501 transitions. [2020-10-13 23:42:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:42:19,945 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 257 [2020-10-13 23:42:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:19,948 INFO L225 Difference]: With dead ends: 484 [2020-10-13 23:42:19,948 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 23:42:19,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:42:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 23:42:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-13 23:42:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 23:42:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 274 transitions. [2020-10-13 23:42:19,964 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 274 transitions. Word has length 257 [2020-10-13 23:42:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:19,964 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 274 transitions. [2020-10-13 23:42:19,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:42:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 274 transitions. [2020-10-13 23:42:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-13 23:42:19,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:19,966 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 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 23:42:19,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:42:19,967 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:19,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2119339690, now seen corresponding path program 40 times [2020-10-13 23:42:19,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:19,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550703196] [2020-10-13 23:42:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:20,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:20,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:25,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:25,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-13 23:42:25,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 23:42:25,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:25,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:42:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-13 23:42:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:42:25,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:26,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:26,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:26,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:26,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:26,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:26,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:26,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:26,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:26,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:26,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4920 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 4100 trivial. 0 not checked. [2020-10-13 23:42:26,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550703196] [2020-10-13 23:42:26,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:26,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:42:26,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261629872] [2020-10-13 23:42:26,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:42:26,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:26,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:42:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:42:26,057 INFO L87 Difference]: Start difference. First operand 268 states and 274 transitions. Second operand 44 states. [2020-10-13 23:42:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:26,793 INFO L93 Difference]: Finished difference Result 495 states and 512 transitions. [2020-10-13 23:42:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:42:26,794 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 263 [2020-10-13 23:42:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:26,795 INFO L225 Difference]: With dead ends: 495 [2020-10-13 23:42:26,796 INFO L226 Difference]: Without dead ends: 274 [2020-10-13 23:42:26,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:42:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-13 23:42:26,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-10-13 23:42:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-13 23:42:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 280 transitions. [2020-10-13 23:42:26,804 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 280 transitions. Word has length 263 [2020-10-13 23:42:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:26,805 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 280 transitions. [2020-10-13 23:42:26,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:42:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 280 transitions. [2020-10-13 23:42:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-13 23:42:26,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:26,807 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 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 23:42:26,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:42:26,807 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:26,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1957658509, now seen corresponding path program 41 times [2020-10-13 23:42:26,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:26,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319951455] [2020-10-13 23:42:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:26,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:27,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:27,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking...