/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_init1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:34:32,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:34:32,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:34:32,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:34:32,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:34:32,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:34:32,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:34:32,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:34:32,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:34:32,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:34:32,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:34:32,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:34:32,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:34:32,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:34:32,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:34:32,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:34:32,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:34:32,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:34:32,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:34:32,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:34:32,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:34:32,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:34:32,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:34:32,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:34:32,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:34:32,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:34:32,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:34:32,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:34:32,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:34:32,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:34:32,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:34:32,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:34:32,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:34:32,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:34:32,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:34:32,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:34:32,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:34:32,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:34:32,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:34:32,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:34:32,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:34:32,227 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 23:34:32,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:34:32,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:34:32,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:34:32,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:34:32,272 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:34:32,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:34:32,273 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:34:32,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:34:32,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:34:32,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:34:32,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:34:32,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:34:32,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:34:32,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:34:32,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:34:32,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:34:32,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:34:32,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:34:32,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:34:32,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:34:32,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:34:32,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:34:32,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:34:32,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:34:32,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:34:32,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:34:32,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:34:32,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:34:32,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:34:32,280 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 23:34:32,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:34:32,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:34:32,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:34:32,627 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:34:32,627 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:34:32,628 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2020-10-13 23:34:32,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70f499803/5a1e4e9e0bd34ff585421d1056d3740b/FLAG7efe769ee [2020-10-13 23:34:33,152 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:34:33,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2020-10-13 23:34:33,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70f499803/5a1e4e9e0bd34ff585421d1056d3740b/FLAG7efe769ee [2020-10-13 23:34:33,547 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70f499803/5a1e4e9e0bd34ff585421d1056d3740b [2020-10-13 23:34:33,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:34:33,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:34:33,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:33,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:34:33,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:34:33,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d228d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33, skipping insertion in model container [2020-10-13 23:34:33,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:34:33,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:34:33,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:33,749 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:34:33,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:33,784 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:34:33,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33 WrapperNode [2020-10-13 23:34:33,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:33,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:34:33,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:34:33,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:34:33,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (1/1) ... [2020-10-13 23:34:33,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:34:33,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:34:33,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:34:33,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:34:33,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (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 23:34:33,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:34:33,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:34:33,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:34:33,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:34:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:34:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:34:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:34:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:34:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:34:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:34:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:34:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:34:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:34:34,174 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:34:34,174 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 23:34:34,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:34 BoogieIcfgContainer [2020-10-13 23:34:34,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:34:34,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:34:34,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:34:34,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:34:34,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:34:33" (1/3) ... [2020-10-13 23:34:34,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d88a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:34, skipping insertion in model container [2020-10-13 23:34:34,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:33" (2/3) ... [2020-10-13 23:34:34,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d88a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:34, skipping insertion in model container [2020-10-13 23:34:34,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:34" (3/3) ... [2020-10-13 23:34:34,187 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2020-10-13 23:34:34,201 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:34:34,218 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:34:34,242 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:34:34,276 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:34:34,276 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:34:34,276 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:34:34,277 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:34:34,277 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:34:34,277 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:34:34,277 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:34:34,278 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:34:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-13 23:34:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 23:34:34,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:34,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:34,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash -441053002, now seen corresponding path program 1 times [2020-10-13 23:34:34,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:34,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214233949] [2020-10-13 23:34:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:34,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:34,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:34:34,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:34,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 23:34:34,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:34,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:34:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:34,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:34:34,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:34,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:34,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:34,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:34:34,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:34,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:34,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:34,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:34,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:34,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:34,618 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 23:34:34,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214233949] [2020-10-13 23:34:34,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:34,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:34:34,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860098404] [2020-10-13 23:34:34,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:34:34,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:34,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:34:34,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:34:34,648 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-13 23:34:34,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:34,732 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-13 23:34:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:34:34,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 23:34:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:34,743 INFO L225 Difference]: With dead ends: 39 [2020-10-13 23:34:34,743 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 23:34:34,747 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 23:34:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 23:34:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 23:34:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 23:34:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 23:34:34,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-13 23:34:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:34,791 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 23:34:34,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:34:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 23:34:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 23:34:34,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:34,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:34,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:34:34,796 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 303899570, now seen corresponding path program 1 times [2020-10-13 23:34:34,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:34,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444980502] [2020-10-13 23:34:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:34,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:34,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:34:34,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:34,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-13 23:34:34,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:34,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:34,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:34:34,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:34,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:34:34,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:34,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:34,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:34,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:34,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:34:34,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:34,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:34,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:34,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:34,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:34,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:35,003 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 23:34:35,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444980502] [2020-10-13 23:34:35,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:35,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:34:35,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693130011] [2020-10-13 23:34:35,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:34:35,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:34:35,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:34:35,009 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-10-13 23:34:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:35,066 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-13 23:34:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:34:35,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 23:34:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:35,068 INFO L225 Difference]: With dead ends: 30 [2020-10-13 23:34:35,068 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 23:34:35,070 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 23:34:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 23:34:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 23:34:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 23:34:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-13 23:34:35,077 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2020-10-13 23:34:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:35,077 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-13 23:34:35,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:34:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-13 23:34:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 23:34:35,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:35,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:35,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:34:35,079 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1260126610, now seen corresponding path program 1 times [2020-10-13 23:34:35,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:35,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261669925] [2020-10-13 23:34:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:35,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 23:34:35,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-13 23:34:35,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:35,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:34:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:34:35,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:35,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:35,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:35,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:35,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:34:35,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:35,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:35,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:35,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:35,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:35,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:35,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261669925] [2020-10-13 23:34:35,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:35,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:34:35,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256674040] [2020-10-13 23:34:35,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:34:35,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:35,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:34:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:34:35,285 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-13 23:34:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:35,340 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-13 23:34:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:34:35,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 23:34:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:35,342 INFO L225 Difference]: With dead ends: 31 [2020-10-13 23:34:35,342 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 23:34:35,343 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 23:34:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 23:34:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 23:34:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 23:34:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 23:34:35,349 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-10-13 23:34:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:35,349 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 23:34:35,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:34:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 23:34:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:34:35,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:35,351 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:35,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:34:35,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:35,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1794669362, now seen corresponding path program 2 times [2020-10-13 23:34:35,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:35,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245387648] [2020-10-13 23:34:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:35,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:34:35,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:35,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-13 23:34:35,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:35,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:35,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:34:35,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:35,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:34:35,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:35,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:35,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:35,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:35,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:34:35,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:35,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:35,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:35,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:35,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:35,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:35,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245387648] [2020-10-13 23:34:35,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:35,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:34:35,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750310790] [2020-10-13 23:34:35,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:34:35,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:35,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:34:35,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:35,574 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-13 23:34:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:35,632 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-13 23:34:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:34:35,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-13 23:34:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:35,633 INFO L225 Difference]: With dead ends: 32 [2020-10-13 23:34:35,634 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 23:34:35,634 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 23:34:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 23:34:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 23:34:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 23:34:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 23:34:35,640 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2020-10-13 23:34:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:35,640 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 23:34:35,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:34:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 23:34:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:34:35,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:35,641 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:35,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:34:35,642 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:35,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2004063982, now seen corresponding path program 3 times [2020-10-13 23:34:35,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:35,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994541573] [2020-10-13 23:34:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:35,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:34:35,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:35,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 23:34:35,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:35,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:34:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:34:35,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:35,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:35,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:35,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:35,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:34:35,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:35,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:35,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:35,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:35,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994541573] [2020-10-13 23:34:35,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:35,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:34:35,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935151454] [2020-10-13 23:34:35,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:34:35,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:35,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:34:35,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:35,872 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-13 23:34:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:35,933 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-13 23:34:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:34:35,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-13 23:34:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:35,935 INFO L225 Difference]: With dead ends: 33 [2020-10-13 23:34:35,935 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 23:34:35,935 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 23:34:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 23:34:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 23:34:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:34:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 23:34:35,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-10-13 23:34:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:35,941 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 23:34:35,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:34:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 23:34:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:35,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:35,942 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:35,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:34:35,943 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash -94637390, now seen corresponding path program 4 times [2020-10-13 23:34:35,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:35,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155817238] [2020-10-13 23:34:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:36,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:36,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-13 23:34:36,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:34:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:36,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:34:36,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:36,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:36,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:36,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:36,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:36,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:36,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155817238] [2020-10-13 23:34:36,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:36,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:34:36,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269495203] [2020-10-13 23:34:36,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:34:36,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:34:36,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:36,175 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-10-13 23:34:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:36,253 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-13 23:34:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:34:36,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-13 23:34:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:36,254 INFO L225 Difference]: With dead ends: 34 [2020-10-13 23:34:36,255 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 23:34:36,255 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 23:34:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 23:34:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 23:34:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 23:34:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-13 23:34:36,261 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-10-13 23:34:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:36,261 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-13 23:34:36,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:34:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-13 23:34:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 23:34:36,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:36,262 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:36,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:34:36,263 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:36,264 INFO L82 PathProgramCache]: Analyzing trace with hash -729870482, now seen corresponding path program 5 times [2020-10-13 23:34:36,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:36,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46800085] [2020-10-13 23:34:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:36,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 23:34:36,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:36,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-13 23:34:36,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:34:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:36,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:34:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:36,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:36,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:36,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:36,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:36,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:36,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:36,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:36,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:36,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46800085] [2020-10-13 23:34:36,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:36,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:34:36,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281304152] [2020-10-13 23:34:36,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:34:36,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:34:36,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:36,443 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-13 23:34:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:36,515 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-13 23:34:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:34:36,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-13 23:34:36,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:36,517 INFO L225 Difference]: With dead ends: 35 [2020-10-13 23:34:36,517 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 23:34:36,518 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 23:34:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 23:34:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 23:34:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:34:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 23:34:36,523 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-10-13 23:34:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:36,524 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 23:34:36,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:34:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 23:34:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:34:36,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:36,525 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:36,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:34:36,526 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:36,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1052740146, now seen corresponding path program 6 times [2020-10-13 23:34:36,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:36,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983893559] [2020-10-13 23:34:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:36,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:34:36,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:36,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-13 23:34:36,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:34:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:34:36,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:36,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:36,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:36,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:36,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:36,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:36,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:36,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:36,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:36,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983893559] [2020-10-13 23:34:36,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:36,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:34:36,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875492777] [2020-10-13 23:34:36,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:34:36,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:36,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:34:36,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:34:36,752 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-13 23:34:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:36,813 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-13 23:34:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:34:36,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-13 23:34:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:36,814 INFO L225 Difference]: With dead ends: 36 [2020-10-13 23:34:36,814 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 23:34:36,814 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 23:34:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 23:34:36,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 23:34:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:34:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-13 23:34:36,821 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2020-10-13 23:34:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:36,821 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-13 23:34:36,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:34:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-13 23:34:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:34:36,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:36,822 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:36,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:34:36,823 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:36,823 INFO L82 PathProgramCache]: Analyzing trace with hash 479094766, now seen corresponding path program 7 times [2020-10-13 23:34:36,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:36,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339198023] [2020-10-13 23:34:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:36,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:34:36,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:36,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-13 23:34:36,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:34:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:36,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:34:36,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:37,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:37,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:37,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:37,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:37,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:37,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339198023] [2020-10-13 23:34:37,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:37,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:34:37,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733630829] [2020-10-13 23:34:37,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:34:37,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:34:37,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:34:37,039 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2020-10-13 23:34:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:37,112 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-13 23:34:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:34:37,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-13 23:34:37,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:37,113 INFO L225 Difference]: With dead ends: 37 [2020-10-13 23:34:37,113 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:34:37,114 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 23:34:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:34:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 23:34:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:34:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 23:34:37,119 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2020-10-13 23:34:37,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:37,119 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 23:34:37,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:34:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 23:34:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:34:37,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:37,120 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:37,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:34:37,121 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -124042830, now seen corresponding path program 8 times [2020-10-13 23:34:37,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:37,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480576491] [2020-10-13 23:34:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:37,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:34:37,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:37,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-13 23:34:37,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:34:37,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:37,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:34:37,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:37,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:37,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:37,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:37,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:37,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:37,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:37,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:37,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480576491] [2020-10-13 23:34:37,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:37,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:34:37,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061643498] [2020-10-13 23:34:37,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:34:37,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:37,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:34:37,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:34:37,370 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-13 23:34:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:37,455 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-13 23:34:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:34:37,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-13 23:34:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:37,457 INFO L225 Difference]: With dead ends: 38 [2020-10-13 23:34:37,457 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 23:34:37,457 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 23:34:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 23:34:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 23:34:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:34:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-13 23:34:37,462 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-13 23:34:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:37,462 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-13 23:34:37,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:34:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-13 23:34:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:34:37,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:37,464 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:37,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:34:37,464 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:37,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1641439122, now seen corresponding path program 9 times [2020-10-13 23:34:37,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:37,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436982848] [2020-10-13 23:34:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:37,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:34:37,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:37,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-13 23:34:37,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:34:37,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:37,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:34:37,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:37,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:37,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:37,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:34:37,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:37,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:37,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:37,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:37,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436982848] [2020-10-13 23:34:37,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:37,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:34:37,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160350395] [2020-10-13 23:34:37,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:34:37,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:37,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:34:37,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:34:37,789 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-10-13 23:34:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:37,875 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-13 23:34:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:34:37,878 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-13 23:34:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:37,879 INFO L225 Difference]: With dead ends: 39 [2020-10-13 23:34:37,880 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:34:37,881 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 23:34:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:34:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 23:34:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:34:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 23:34:37,890 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2020-10-13 23:34:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:37,890 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 23:34:37,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:34:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 23:34:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:34:37,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:37,892 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:37,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:34:37,892 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:37,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1436083918, now seen corresponding path program 10 times [2020-10-13 23:34:37,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:37,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653246814] [2020-10-13 23:34:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:37,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:38,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:34:38,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:38,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-13 23:34:38,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:38,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:34:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:38,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:34:38,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:38,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:38,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:38,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:38,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:38,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:38,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:38,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:38,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653246814] [2020-10-13 23:34:38,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:38,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:34:38,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329788396] [2020-10-13 23:34:38,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:34:38,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:34:38,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:34:38,399 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-10-13 23:34:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:38,513 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-13 23:34:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:34:38,514 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-13 23:34:38,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:38,515 INFO L225 Difference]: With dead ends: 40 [2020-10-13 23:34:38,516 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:34:38,517 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 23:34:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:34:38,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 23:34:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:34:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-13 23:34:38,524 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2020-10-13 23:34:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:38,526 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-13 23:34:38,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:34:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-13 23:34:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:34:38,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:38,529 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:38,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:34:38,529 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash 634960110, now seen corresponding path program 11 times [2020-10-13 23:34:38,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:38,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986300237] [2020-10-13 23:34:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:38,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:38,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:34:38,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:38,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-13 23:34:38,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:38,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:38,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:34:38,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:34:38,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:39,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:39,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:39,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:39,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:39,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:39,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:39,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:39,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:39,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:39,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:39,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986300237] [2020-10-13 23:34:39,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:39,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:34:39,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681168864] [2020-10-13 23:34:39,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:34:39,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:39,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:34:39,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:34:39,074 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2020-10-13 23:34:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:39,188 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-13 23:34:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:34:39,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-13 23:34:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:39,189 INFO L225 Difference]: With dead ends: 41 [2020-10-13 23:34:39,189 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:34:39,190 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 23:34:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:34:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 23:34:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 23:34:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-13 23:34:39,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2020-10-13 23:34:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:39,199 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-13 23:34:39,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:34:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-13 23:34:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:34:39,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:39,202 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:39,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:34:39,203 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:39,204 INFO L82 PathProgramCache]: Analyzing trace with hash 412815538, now seen corresponding path program 12 times [2020-10-13 23:34:39,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:39,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291941696] [2020-10-13 23:34:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:39,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:39,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:39,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:34:39,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-13 23:34:39,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:39,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:34:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:34:39,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:39,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:39,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:39,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:39,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:39,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:39,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:39,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:39,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:39,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:39,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291941696] [2020-10-13 23:34:39,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:39,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:34:39,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318721444] [2020-10-13 23:34:39,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:34:39,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:34:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:34:39,728 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2020-10-13 23:34:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:39,813 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-13 23:34:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:34:39,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-13 23:34:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:39,814 INFO L225 Difference]: With dead ends: 42 [2020-10-13 23:34:39,815 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:34:39,815 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 23:34:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:34:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 23:34:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:34:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 23:34:39,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-13 23:34:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:39,825 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 23:34:39,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:34:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 23:34:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:34:39,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:39,828 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:39,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:34:39,828 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:39,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2116268398, now seen corresponding path program 13 times [2020-10-13 23:34:39,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:39,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865952003] [2020-10-13 23:34:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:39,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:40,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:34:40,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-13 23:34:40,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:40,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:34:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:34:40,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:40,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:40,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:40,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:40,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:40,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:40,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:40,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:40,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:40,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:40,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:40,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:40,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865952003] [2020-10-13 23:34:40,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:40,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:34:40,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643056726] [2020-10-13 23:34:40,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:34:40,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:34:40,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:34:40,406 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 17 states. [2020-10-13 23:34:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:40,509 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-13 23:34:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:34:40,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-13 23:34:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:40,510 INFO L225 Difference]: With dead ends: 43 [2020-10-13 23:34:40,511 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 23:34:40,511 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 23:34:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 23:34:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 23:34:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:34:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-13 23:34:40,522 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-10-13 23:34:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:40,524 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-13 23:34:40,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:34:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-13 23:34:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:34:40,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:40,525 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:40,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:34:40,526 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:40,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:40,528 INFO L82 PathProgramCache]: Analyzing trace with hash -911267790, now seen corresponding path program 14 times [2020-10-13 23:34:40,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:40,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417094486] [2020-10-13 23:34:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:40,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:40,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:34:40,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:40,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-13 23:34:40,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:40,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:40,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:34:40,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:40,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:34:40,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:41,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:41,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:41,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:41,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:41,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:41,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:41,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:41,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:41,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:41,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:41,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417094486] [2020-10-13 23:34:41,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:41,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:34:41,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998035559] [2020-10-13 23:34:41,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:34:41,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:41,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:34:41,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:41,052 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 18 states. [2020-10-13 23:34:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:41,154 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-13 23:34:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:34:41,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-13 23:34:41,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:41,156 INFO L225 Difference]: With dead ends: 44 [2020-10-13 23:34:41,156 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 23:34:41,156 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 23:34:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 23:34:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 23:34:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:34:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-13 23:34:41,164 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2020-10-13 23:34:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:41,164 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-13 23:34:41,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:34:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-13 23:34:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:34:41,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:41,166 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:41,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:34:41,167 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:41,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:41,167 INFO L82 PathProgramCache]: Analyzing trace with hash -275609106, now seen corresponding path program 15 times [2020-10-13 23:34:41,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:41,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956422092] [2020-10-13 23:34:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:41,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:41,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:34:41,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:41,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-13 23:34:41,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:41,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:34:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:34:41,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:41,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:41,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:41,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:41,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:41,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:41,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:41,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:41,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:41,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956422092] [2020-10-13 23:34:41,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:41,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:34:41,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678357182] [2020-10-13 23:34:41,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:34:41,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:41,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:34:41,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:41,691 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-10-13 23:34:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:41,811 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-13 23:34:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:34:41,812 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-13 23:34:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:41,813 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:34:41,813 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:34:41,814 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 23:34:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:34:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:34:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:34:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-13 23:34:41,818 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2020-10-13 23:34:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:41,818 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-13 23:34:41,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:34:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-13 23:34:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:34:41,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:41,819 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:41,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:34:41,820 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2045026382, now seen corresponding path program 16 times [2020-10-13 23:34:41,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:41,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469145943] [2020-10-13 23:34:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:41,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:42,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:34:42,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:42,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-13 23:34:42,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:42,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:34:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:42,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:34:42,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:42,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:42,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:42,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:42,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:42,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:42,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:42,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:42,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:42,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469145943] [2020-10-13 23:34:42,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:42,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:34:42,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344537776] [2020-10-13 23:34:42,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:34:42,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:34:42,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:34:42,348 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 20 states. [2020-10-13 23:34:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:42,427 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-13 23:34:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:34:42,427 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-13 23:34:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:42,428 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:34:42,428 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 23:34:42,429 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 23:34:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 23:34:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 23:34:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:34:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-13 23:34:42,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2020-10-13 23:34:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:42,434 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-13 23:34:42,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:34:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-13 23:34:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:34:42,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:42,435 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:42,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:34:42,435 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:42,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1062387090, now seen corresponding path program 17 times [2020-10-13 23:34:42,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:42,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043648289] [2020-10-13 23:34:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:42,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:34:42,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:42,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-13 23:34:42,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:42,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:34:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:34:42,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:42,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:42,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:42,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:42,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:42,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:42,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:42,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:42,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043648289] [2020-10-13 23:34:42,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:42,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:34:42,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462764316] [2020-10-13 23:34:42,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:34:42,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:34:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:34:42,994 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 21 states. [2020-10-13 23:34:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:43,070 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-13 23:34:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:34:43,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-13 23:34:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:43,072 INFO L225 Difference]: With dead ends: 47 [2020-10-13 23:34:43,072 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 23:34:43,073 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 23:34:43,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 23:34:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 23:34:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:34:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-13 23:34:43,077 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-10-13 23:34:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:43,077 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-13 23:34:43,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:34:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-13 23:34:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:34:43,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:43,078 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:43,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:34:43,079 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:43,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:43,079 INFO L82 PathProgramCache]: Analyzing trace with hash -665340110, now seen corresponding path program 18 times [2020-10-13 23:34:43,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:43,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401855035] [2020-10-13 23:34:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:43,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:34:43,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-13 23:34:43,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:43,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:34:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:43,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:34:43,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:43,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:43,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:43,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:43,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:43,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:43,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:43,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:43,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401855035] [2020-10-13 23:34:43,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:43,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:34:43,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313535280] [2020-10-13 23:34:43,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:34:43,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:34:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:34:43,773 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 22 states. [2020-10-13 23:34:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:43,894 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-13 23:34:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:34:43,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-13 23:34:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:43,895 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:34:43,895 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:34:43,896 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 23:34:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:34:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 23:34:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:34:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 23:34:43,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-13 23:34:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:43,901 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 23:34:43,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:34:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 23:34:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:34:43,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:43,902 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:43,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:34:43,902 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:43,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1241785618, now seen corresponding path program 19 times [2020-10-13 23:34:43,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:43,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216458142] [2020-10-13 23:34:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:44,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:34:44,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-13 23:34:44,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:44,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:34:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:34:44,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:44,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:44,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:44,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:44,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:44,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:44,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:44,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:44,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:44,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216458142] [2020-10-13 23:34:44,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:44,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:34:44,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551152067] [2020-10-13 23:34:44,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:34:44,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:34:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:34:44,717 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 23 states. [2020-10-13 23:34:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:44,833 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-13 23:34:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:34:44,834 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-13 23:34:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:44,835 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:34:44,835 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:34:44,835 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 23:34:44,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:34:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 23:34:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:34:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-13 23:34:44,840 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-10-13 23:34:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:44,841 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-13 23:34:44,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:34:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-13 23:34:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:34:44,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:44,842 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:44,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:34:44,843 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:44,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1931727182, now seen corresponding path program 20 times [2020-10-13 23:34:44,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:44,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148807109] [2020-10-13 23:34:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:44,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:45,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:34:45,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:45,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-13 23:34:45,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:45,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:45,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:34:45,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:45,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:34:45,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:45,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:45,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:45,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:45,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:45,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:45,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:45,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:45,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:45,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148807109] [2020-10-13 23:34:45,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:45,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:34:45,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759363978] [2020-10-13 23:34:45,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:34:45,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:34:45,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:34:45,583 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 24 states. [2020-10-13 23:34:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:45,709 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-13 23:34:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:34:45,711 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-13 23:34:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:45,712 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:34:45,712 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:34:45,713 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 23:34:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:34:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 23:34:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:34:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-13 23:34:45,723 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2020-10-13 23:34:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:45,724 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-13 23:34:45,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:34:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-13 23:34:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:34:45,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:45,724 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:45,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:34:45,725 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1845079186, now seen corresponding path program 21 times [2020-10-13 23:34:45,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:45,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159053428] [2020-10-13 23:34:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:45,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:46,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:46,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:34:46,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:46,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-13 23:34:46,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:46,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:46,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:34:46,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:46,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:34:46,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-13 23:34:46,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:46,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:46,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:46,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:46,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:46,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:46,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:46,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:46,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:46,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:46,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159053428] [2020-10-13 23:34:46,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:46,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:34:46,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389992954] [2020-10-13 23:34:46,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:34:46,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:46,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:34:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:46,607 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 25 states. [2020-10-13 23:34:46,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:46,752 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-13 23:34:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:34:46,752 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-13 23:34:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:46,753 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:34:46,753 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:34:46,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:34:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:34:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:34:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 23:34:46,766 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2020-10-13 23:34:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:46,766 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 23:34:46,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:34:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 23:34:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:34:46,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:46,773 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:46,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:34:46,774 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 841008690, now seen corresponding path program 22 times [2020-10-13 23:34:46,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:46,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774269967] [2020-10-13 23:34:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:47,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:34:47,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:47,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-13 23:34:47,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:47,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:47,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:34:47,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:47,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:34:47,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:47,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:47,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:47,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:47,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:47,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:47,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:47,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:47,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:47,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:47,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:47,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:47,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774269967] [2020-10-13 23:34:47,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:47,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:34:47,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298395079] [2020-10-13 23:34:47,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:34:47,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:47,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:34:47,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:47,656 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 26 states. [2020-10-13 23:34:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:47,737 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-13 23:34:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:34:47,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 35 [2020-10-13 23:34:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:47,738 INFO L225 Difference]: With dead ends: 52 [2020-10-13 23:34:47,738 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:34:47,739 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 23:34:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:34:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 23:34:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:34:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-13 23:34:47,744 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2020-10-13 23:34:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:47,744 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-13 23:34:47,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:34:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-13 23:34:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:34:47,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:47,745 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:47,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:34:47,747 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1789613074, now seen corresponding path program 23 times [2020-10-13 23:34:47,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:47,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839198115] [2020-10-13 23:34:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:47,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:48,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:34:48,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:48,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-13 23:34:48,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:48,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:34:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:34:48,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:48,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:48,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:48,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:48,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:48,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:48,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:48,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:48,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839198115] [2020-10-13 23:34:48,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:48,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:34:48,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365584995] [2020-10-13 23:34:48,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:34:48,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:48,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:34:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:34:48,679 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 27 states. [2020-10-13 23:34:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:48,816 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-13 23:34:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:34:48,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-10-13 23:34:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:48,818 INFO L225 Difference]: With dead ends: 53 [2020-10-13 23:34:48,818 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 23:34:48,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:34:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 23:34:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 23:34:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:34:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-13 23:34:48,824 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-10-13 23:34:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:48,824 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-13 23:34:48,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:34:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-13 23:34:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:34:48,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:48,826 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:48,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:34:48,826 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1734509134, now seen corresponding path program 24 times [2020-10-13 23:34:48,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:48,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385976609] [2020-10-13 23:34:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:48,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:49,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:49,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:34:49,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:49,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-13 23:34:49,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:49,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:49,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:34:49,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:49,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:34:49,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:49,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:49,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:49,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:49,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:49,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:49,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:49,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:49,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:49,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:49,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:49,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385976609] [2020-10-13 23:34:49,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:49,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:34:49,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805843702] [2020-10-13 23:34:49,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:34:49,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:34:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:34:49,801 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 28 states. [2020-10-13 23:34:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:49,943 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-13 23:34:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:34:49,944 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-10-13 23:34:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:49,944 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:34:49,945 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:34:49,945 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 23:34:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:34:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 23:34:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:34:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 23:34:49,949 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2020-10-13 23:34:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:49,949 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 23:34:49,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:34:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 23:34:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:34:49,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:49,950 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:49,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:34:49,951 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:49,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:49,951 INFO L82 PathProgramCache]: Analyzing trace with hash -26286994, now seen corresponding path program 25 times [2020-10-13 23:34:49,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:49,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628307421] [2020-10-13 23:34:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:49,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:50,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:50,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:34:50,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:50,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-13 23:34:50,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:50,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:50,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:34:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:34:50,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:51,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:51,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:51,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:51,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:51,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:51,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:51,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:51,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:51,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:51,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:51,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:51,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:51,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628307421] [2020-10-13 23:34:51,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:51,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:34:51,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79658666] [2020-10-13 23:34:51,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:34:51,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:51,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:34:51,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:34:51,229 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 29 states. [2020-10-13 23:34:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:51,380 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-13 23:34:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:34:51,381 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-10-13 23:34:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:51,382 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:34:51,382 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:34:51,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:34:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:34:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 23:34:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:34:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-13 23:34:51,387 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2020-10-13 23:34:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:51,387 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-13 23:34:51,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:34:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-13 23:34:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:34:51,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:51,388 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:51,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:34:51,389 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1388991794, now seen corresponding path program 26 times [2020-10-13 23:34:51,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:51,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902352698] [2020-10-13 23:34:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:51,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:51,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:51,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:34:51,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:51,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-13 23:34:51,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:51,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:34:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:34:51,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:52,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:52,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:52,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:52,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:52,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:52,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:52,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:52,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:52,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902352698] [2020-10-13 23:34:52,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:52,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:34:52,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555641412] [2020-10-13 23:34:52,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:34:52,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:52,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:34:52,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:34:52,484 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 30 states. [2020-10-13 23:34:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:52,630 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-13 23:34:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:34:52,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 39 [2020-10-13 23:34:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:52,631 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:34:52,632 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 23:34:52,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:34:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 23:34:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 23:34:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 23:34:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 23:34:52,636 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2020-10-13 23:34:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:52,636 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 23:34:52,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:34:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 23:34:52,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:34:52,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:52,637 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:52,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:34:52,638 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1982006034, now seen corresponding path program 27 times [2020-10-13 23:34:52,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:52,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077395429] [2020-10-13 23:34:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:52,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:53,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:53,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:34:53,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:53,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-13 23:34:53,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:53,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:34:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:34:53,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:53,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:53,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:53,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:53,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:53,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:53,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:53,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:53,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:53,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077395429] [2020-10-13 23:34:53,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:53,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:34:53,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845082892] [2020-10-13 23:34:53,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:34:53,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:34:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:34:53,674 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 31 states. [2020-10-13 23:34:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:53,751 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-13 23:34:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:34:53,752 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2020-10-13 23:34:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:53,753 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:34:53,753 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:34:53,754 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 23:34:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:34:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 23:34:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:34:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 23:34:53,757 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2020-10-13 23:34:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:53,758 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 23:34:53,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:34:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 23:34:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:34:53,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:53,759 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:53,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:34:53,759 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash 891243698, now seen corresponding path program 28 times [2020-10-13 23:34:53,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:53,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257763455] [2020-10-13 23:34:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:53,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:54,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:34:54,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:54,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-13 23:34:54,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:54,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:54,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:34:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:34:54,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:54,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:54,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:54,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:54,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:54,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:54,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:54,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:54,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257763455] [2020-10-13 23:34:54,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:54,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:34:54,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126721048] [2020-10-13 23:34:54,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:34:54,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:54,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:34:54,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:34:54,921 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 32 states. [2020-10-13 23:34:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:55,055 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-13 23:34:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:34:55,056 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2020-10-13 23:34:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:55,057 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:34:55,057 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 23:34:55,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:34:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 23:34:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 23:34:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:34:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-13 23:34:55,061 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-10-13 23:34:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:55,061 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-13 23:34:55,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:34:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-13 23:34:55,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:34:55,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:55,062 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:55,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:34:55,063 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash -232327826, now seen corresponding path program 29 times [2020-10-13 23:34:55,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:55,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247336103] [2020-10-13 23:34:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:55,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:55,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:34:55,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:55,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-13 23:34:55,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:55,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:55,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:34:55,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:55,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:34:55,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:56,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:56,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:56,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:56,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:56,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:56,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:56,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:56,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:56,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:56,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:56,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:56,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:56,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247336103] [2020-10-13 23:34:56,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:56,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:34:56,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83596328] [2020-10-13 23:34:56,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:34:56,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:56,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:34:56,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:34:56,147 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 33 states. [2020-10-13 23:34:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:56,319 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-13 23:34:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:34:56,319 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-13 23:34:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:56,320 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:34:56,320 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 23:34:56,321 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 23:34:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 23:34:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-13 23:34:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:34:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-13 23:34:56,325 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2020-10-13 23:34:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:56,325 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-13 23:34:56,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:34:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-13 23:34:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:34:56,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:56,326 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:56,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:34:56,327 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash -703306702, now seen corresponding path program 30 times [2020-10-13 23:34:56,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:56,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874961349] [2020-10-13 23:34:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:56,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:56,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:34:56,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:56,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-13 23:34:56,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:56,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:56,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:34:56,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:34:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:57,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:57,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:57,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:57,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:57,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:57,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:57,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:57,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:57,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:57,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:57,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874961349] [2020-10-13 23:34:57,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:57,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:34:57,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504357954] [2020-10-13 23:34:57,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:34:57,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:34:57,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:34:57,548 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 34 states. [2020-10-13 23:34:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:57,702 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-13 23:34:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:34:57,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 43 [2020-10-13 23:34:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:57,704 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:34:57,704 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:34:57,705 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 23:34:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:34:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 23:34:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 23:34:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 23:34:57,710 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2020-10-13 23:34:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:57,710 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 23:34:57,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:34:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 23:34:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:34:57,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:57,711 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:57,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:34:57,712 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1876217326, now seen corresponding path program 31 times [2020-10-13 23:34:57,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:57,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572380329] [2020-10-13 23:34:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:57,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:58,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:34:58,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:58,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-13 23:34:58,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:58,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:58,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:34:58,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:58,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:34:58,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:58,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:58,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:58,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:58,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:58,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:58,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:58,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:58,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:58,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:58,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:58,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:59,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572380329] [2020-10-13 23:34:59,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:59,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:34:59,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788089520] [2020-10-13 23:34:59,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:34:59,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:59,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:34:59,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:34:59,005 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 35 states. [2020-10-13 23:34:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:59,166 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-13 23:34:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:34:59,166 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-10-13 23:34:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:59,167 INFO L225 Difference]: With dead ends: 61 [2020-10-13 23:34:59,167 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:34:59,168 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 23:34:59,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:34:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 23:34:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 23:34:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 23:34:59,171 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2020-10-13 23:34:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:59,172 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 23:34:59,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:34:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 23:34:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:34:59,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:59,173 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:59,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:34:59,173 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:59,174 INFO L82 PathProgramCache]: Analyzing trace with hash 237083570, now seen corresponding path program 32 times [2020-10-13 23:34:59,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:59,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239436117] [2020-10-13 23:34:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:59,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:59,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:34:59,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:59,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-13 23:34:59,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:59,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:34:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:34:59,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:00,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:00,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:00,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:00,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:00,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:00,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:00,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:00,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:00,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:00,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:00,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:00,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:00,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239436117] [2020-10-13 23:35:00,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:00,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:35:00,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559701506] [2020-10-13 23:35:00,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:35:00,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:35:00,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:35:00,534 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 36 states. [2020-10-13 23:35:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:00,726 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-13 23:35:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:35:00,726 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 45 [2020-10-13 23:35:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:00,727 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:35:00,727 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:35:00,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:35:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:35:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 23:35:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:35:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-13 23:35:00,733 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2020-10-13 23:35:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:00,734 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-13 23:35:00,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:35:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-13 23:35:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:35:00,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:00,734 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:00,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:35:00,735 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:00,738 INFO L82 PathProgramCache]: Analyzing trace with hash 963544686, now seen corresponding path program 33 times [2020-10-13 23:35:00,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:00,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638882184] [2020-10-13 23:35:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:00,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:01,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:01,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:35:01,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:01,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-13 23:35:01,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:01,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:35:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:35:01,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:02,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:02,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:02,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:02,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:02,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:02,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:02,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:02,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:02,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:02,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:02,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:02,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:02,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638882184] [2020-10-13 23:35:02,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:02,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:35:02,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210987615] [2020-10-13 23:35:02,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:35:02,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:02,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:35:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:35:02,106 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 37 states. [2020-10-13 23:35:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:02,222 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-13 23:35:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:35:02,222 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-13 23:35:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:02,223 INFO L225 Difference]: With dead ends: 63 [2020-10-13 23:35:02,223 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:35:02,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:35:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:35:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 23:35:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:35:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 23:35:02,231 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-13 23:35:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:02,231 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 23:35:02,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:35:02,233 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 23:35:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:35:02,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:02,233 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:02,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:35:02,234 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:02,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:02,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2009002802, now seen corresponding path program 34 times [2020-10-13 23:35:02,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:02,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812842854] [2020-10-13 23:35:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:02,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:02,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:02,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:35:02,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:02,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-13 23:35:02,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:02,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:02,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:35:02,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:02,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:35:02,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:03,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:03,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:03,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:03,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:03,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:03,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:03,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812842854] [2020-10-13 23:35:03,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:03,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:35:03,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534759990] [2020-10-13 23:35:03,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:35:03,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:03,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:35:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:35:03,554 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 38 states. [2020-10-13 23:35:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:03,626 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-13 23:35:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:35:03,627 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2020-10-13 23:35:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:03,628 INFO L225 Difference]: With dead ends: 64 [2020-10-13 23:35:03,628 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:35:03,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:35:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:35:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 23:35:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:35:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-13 23:35:03,635 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2020-10-13 23:35:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:03,635 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-13 23:35:03,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:35:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-13 23:35:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:35:03,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:03,636 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:03,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:35:03,636 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash 58466030, now seen corresponding path program 35 times [2020-10-13 23:35:03,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:03,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603884536] [2020-10-13 23:35:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:03,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:04,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:35:04,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:04,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-13 23:35:04,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:04,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:35:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:35:04,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:04,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:04,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:04,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:04,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:04,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:04,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:04,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:04,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:04,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:04,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:04,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:04,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603884536] [2020-10-13 23:35:04,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:04,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:35:04,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301134058] [2020-10-13 23:35:04,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:35:04,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:04,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:35:04,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:35:04,971 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 39 states. [2020-10-13 23:35:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:05,173 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-13 23:35:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:35:05,173 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 48 [2020-10-13 23:35:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:05,174 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:35:05,174 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:35:05,175 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 23:35:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:35:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 23:35:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:35:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-13 23:35:05,183 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2020-10-13 23:35:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:05,183 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-13 23:35:05,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:35:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-13 23:35:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:35:05,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:05,184 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:05,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:35:05,184 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:05,185 INFO L82 PathProgramCache]: Analyzing trace with hash -278631758, now seen corresponding path program 36 times [2020-10-13 23:35:05,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:05,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065078953] [2020-10-13 23:35:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:05,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:06,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:06,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:35:06,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:06,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-13 23:35:06,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:06,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:35:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:35:06,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:06,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:06,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:06,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:06,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:06,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:06,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:35:06,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:06,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:06,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:06,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:06,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:06,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:06,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065078953] [2020-10-13 23:35:06,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:06,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:35:06,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956942021] [2020-10-13 23:35:06,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:35:06,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:06,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:35:06,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:35:06,911 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 40 states. [2020-10-13 23:35:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:07,132 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-13 23:35:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:35:07,132 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2020-10-13 23:35:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:07,133 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:35:07,133 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:35:07,135 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 23:35:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:35:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 23:35:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:35:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 23:35:07,138 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2020-10-13 23:35:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:07,138 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 23:35:07,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:35:07,138 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 23:35:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:35:07,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:07,139 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:07,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:35:07,139 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2138728594, now seen corresponding path program 37 times [2020-10-13 23:35:07,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:07,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135035872] [2020-10-13 23:35:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:07,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:07,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:07,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:35:07,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-13 23:35:07,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:07,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:35:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:35:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:08,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:08,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:08,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:08,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:08,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:08,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:08,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:08,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:08,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135035872] [2020-10-13 23:35:08,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:08,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:35:08,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251264321] [2020-10-13 23:35:08,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:35:08,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:35:08,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:35:08,533 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 41 states. [2020-10-13 23:35:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:08,745 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-13 23:35:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:35:08,745 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-13 23:35:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:08,746 INFO L225 Difference]: With dead ends: 67 [2020-10-13 23:35:08,746 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:35:08,747 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 23:35:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:35:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 23:35:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:35:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-13 23:35:08,751 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2020-10-13 23:35:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:08,751 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-13 23:35:08,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:35:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-13 23:35:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:35:08,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:08,752 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:08,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:35:08,752 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:08,752 INFO L82 PathProgramCache]: Analyzing trace with hash 327811634, now seen corresponding path program 38 times [2020-10-13 23:35:08,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:08,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73759994] [2020-10-13 23:35:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:08,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:09,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:35:09,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:09,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-13 23:35:09,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:09,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:35:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:35:09,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:10,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:10,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:10,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:10,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:10,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:10,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:10,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:10,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:10,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:10,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:10,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:10,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:10,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73759994] [2020-10-13 23:35:10,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:10,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:35:10,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20363336] [2020-10-13 23:35:10,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:35:10,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:10,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:35:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:35:10,446 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 42 states. [2020-10-13 23:35:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:10,534 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-13 23:35:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:35:10,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-10-13 23:35:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:10,535 INFO L225 Difference]: With dead ends: 68 [2020-10-13 23:35:10,535 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:35:10,536 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 23:35:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:35:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-13 23:35:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 23:35:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-13 23:35:10,540 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-13 23:35:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:10,540 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-13 23:35:10,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:35:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-13 23:35:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:35:10,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:10,541 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:10,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:35:10,541 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash -518852626, now seen corresponding path program 39 times [2020-10-13 23:35:10,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:10,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485831765] [2020-10-13 23:35:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:10,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:11,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:11,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:35:11,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:11,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-13 23:35:11,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:11,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:35:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:35:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:12,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:12,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:12,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:12,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:12,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:12,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:35:12,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:12,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:12,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:12,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:12,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:12,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:12,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485831765] [2020-10-13 23:35:12,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:12,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:35:12,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843502936] [2020-10-13 23:35:12,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:35:12,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:12,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:35:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:35:12,131 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 43 states. [2020-10-13 23:35:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:12,251 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-13 23:35:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:35:12,252 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 52 [2020-10-13 23:35:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:12,253 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:35:12,253 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:35:12,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:35:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:35:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 23:35:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:35:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 23:35:12,260 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2020-10-13 23:35:12,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:12,260 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 23:35:12,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:35:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 23:35:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:35:12,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:12,261 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:12,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:35:12,261 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash -995640910, now seen corresponding path program 40 times [2020-10-13 23:35:12,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:12,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096134410] [2020-10-13 23:35:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:12,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:12,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:12,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:35:12,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:12,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-13 23:35:12,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:12,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:35:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:35:12,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:13,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:13,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:13,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:13,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:13,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:13,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:13,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:13,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:13,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:13,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:13,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:13,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:13,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096134410] [2020-10-13 23:35:13,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:13,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:35:13,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232446386] [2020-10-13 23:35:13,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:35:13,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:35:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:35:13,836 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 44 states. [2020-10-13 23:35:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:14,021 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 23:35:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:35:14,021 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2020-10-13 23:35:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:14,022 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:35:14,022 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:35:14,023 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 23:35:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:35:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 23:35:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:35:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-13 23:35:14,026 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2020-10-13 23:35:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:14,026 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-13 23:35:14,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:35:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-13 23:35:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:35:14,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:14,027 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:14,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:35:14,027 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1403791470, now seen corresponding path program 41 times [2020-10-13 23:35:14,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:14,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295844435] [2020-10-13 23:35:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:14,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:14,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:14,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:35:14,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:14,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-13 23:35:14,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:14,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:14,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 23:35:14,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:14,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 23:35:14,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:15,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:15,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:15,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:15,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:15,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:15,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:15,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:15,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:15,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:15,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:15,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:15,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295844435] [2020-10-13 23:35:15,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:15,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 23:35:15,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316249083] [2020-10-13 23:35:15,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 23:35:15,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:15,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 23:35:15,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:35:15,654 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 45 states. [2020-10-13 23:35:15,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:15,891 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-13 23:35:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:35:15,891 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-10-13 23:35:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:15,892 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:35:15,893 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:35:15,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:35:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:35:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 23:35:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:35:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-13 23:35:15,898 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2020-10-13 23:35:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:15,898 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-13 23:35:15,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 23:35:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-13 23:35:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:35:15,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:15,899 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:15,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:35:15,899 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:15,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1523216078, now seen corresponding path program 42 times [2020-10-13 23:35:15,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:15,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681947734] [2020-10-13 23:35:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:15,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:16,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:16,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:35:16,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:16,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-13 23:35:16,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:16,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:16,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 23:35:16,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:16,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:35:16,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:17,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:17,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:17,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:17,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:17,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:17,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:17,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:17,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:17,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:17,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:17,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:17,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:17,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681947734] [2020-10-13 23:35:17,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:17,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 23:35:17,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443066528] [2020-10-13 23:35:17,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 23:35:17,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 23:35:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:35:17,577 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 46 states. [2020-10-13 23:35:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:17,724 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-13 23:35:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 23:35:17,725 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2020-10-13 23:35:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:17,726 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:35:17,726 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:35:17,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:35:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:35:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 23:35:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:35:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-13 23:35:17,730 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2020-10-13 23:35:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:17,730 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-13 23:35:17,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 23:35:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-13 23:35:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:35:17,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:17,731 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:17,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:35:17,732 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:17,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2066136850, now seen corresponding path program 43 times [2020-10-13 23:35:17,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:17,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180585370] [2020-10-13 23:35:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:18,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:18,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:35:18,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:18,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-13 23:35:18,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:18,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:18,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 23:35:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:35:18,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:19,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:19,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:19,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:19,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:19,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:19,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:19,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:19,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:19,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180585370] [2020-10-13 23:35:19,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:19,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 23:35:19,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757358982] [2020-10-13 23:35:19,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 23:35:19,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 23:35:19,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:35:19,491 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 47 states. [2020-10-13 23:35:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:19,726 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-13 23:35:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 23:35:19,727 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 56 [2020-10-13 23:35:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:19,728 INFO L225 Difference]: With dead ends: 73 [2020-10-13 23:35:19,728 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:35:19,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:35:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:35:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-13 23:35:19,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:35:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-13 23:35:19,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-10-13 23:35:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:19,733 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-13 23:35:19,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 23:35:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-13 23:35:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:35:19,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:19,734 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:19,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:35:19,734 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:19,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1716811598, now seen corresponding path program 44 times [2020-10-13 23:35:19,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:19,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55235612] [2020-10-13 23:35:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:19,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:20,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:20,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:35:20,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:20,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-13 23:35:20,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:20,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 23:35:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:35:20,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:21,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:21,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:21,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:21,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:21,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:21,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:21,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:21,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:21,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:21,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:21,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:21,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55235612] [2020-10-13 23:35:21,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:21,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 23:35:21,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38786477] [2020-10-13 23:35:21,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 23:35:21,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:21,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 23:35:21,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:35:21,631 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 48 states. [2020-10-13 23:35:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:21,790 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-13 23:35:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 23:35:21,791 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 57 [2020-10-13 23:35:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:21,792 INFO L225 Difference]: With dead ends: 74 [2020-10-13 23:35:21,792 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 23:35:21,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:35:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 23:35:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 23:35:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:35:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-13 23:35:21,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2020-10-13 23:35:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:21,797 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-13 23:35:21,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 23:35:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-13 23:35:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:35:21,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:21,798 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:21,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:35:21,798 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash 522336622, now seen corresponding path program 45 times [2020-10-13 23:35:21,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:21,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120850863] [2020-10-13 23:35:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:21,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:22,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:35:22,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:23,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:23,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:23,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:23,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:23,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:23,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:23,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:23,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:23,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:23,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120850863] [2020-10-13 23:35:23,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:23,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 23:35:23,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248118144] [2020-10-13 23:35:23,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 23:35:23,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 23:35:23,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 23:35:23,766 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 49 states. [2020-10-13 23:35:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:24,005 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-13 23:35:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 23:35:24,006 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 58 [2020-10-13 23:35:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:24,007 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:35:24,007 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:35:24,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 23:35:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:35:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 23:35:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:35:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 23:35:24,011 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2020-10-13 23:35:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:24,011 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 23:35:24,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 23:35:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 23:35:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:35:24,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:24,012 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:24,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:35:24,012 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:24,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:24,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1216454706, now seen corresponding path program 46 times [2020-10-13 23:35:24,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:24,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568656133] [2020-10-13 23:35:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:24,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:24,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:24,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:35:24,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:24,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-10-13 23:35:24,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:24,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:24,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 23:35:24,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:24,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:35:24,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:26,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:26,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:26,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:26,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:26,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568656133] [2020-10-13 23:35:26,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:26,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 23:35:26,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461386429] [2020-10-13 23:35:26,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 23:35:26,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 23:35:26,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:35:26,036 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 50 states. [2020-10-13 23:35:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:26,286 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-13 23:35:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 23:35:26,287 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2020-10-13 23:35:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:26,288 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:35:26,288 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:35:26,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:35:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:35:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 23:35:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:35:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-13 23:35:26,293 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2020-10-13 23:35:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:26,293 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-13 23:35:26,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 23:35:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-13 23:35:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:35:26,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:26,294 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:26,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:35:26,294 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1259278830, now seen corresponding path program 47 times [2020-10-13 23:35:26,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:26,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031493524] [2020-10-13 23:35:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:26,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:27,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:27,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:35:27,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:27,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-10-13 23:35:27,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:27,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:27,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 23:35:27,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:27,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 23:35:27,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:28,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:28,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:28,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:28,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:28,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:28,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:28,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:28,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:28,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:28,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031493524] [2020-10-13 23:35:28,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:28,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 23:35:28,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157583786] [2020-10-13 23:35:28,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 23:35:28,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:28,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 23:35:28,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 23:35:28,421 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 51 states. [2020-10-13 23:35:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:28,679 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-13 23:35:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 23:35:28,679 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 60 [2020-10-13 23:35:28,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:28,680 INFO L225 Difference]: With dead ends: 77 [2020-10-13 23:35:28,681 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:35:28,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 23:35:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:35:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 23:35:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:35:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-13 23:35:28,685 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2020-10-13 23:35:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:28,685 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-13 23:35:28,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 23:35:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-13 23:35:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:35:28,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:28,686 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:28,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:35:28,687 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1708140622, now seen corresponding path program 48 times [2020-10-13 23:35:28,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:28,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65111884] [2020-10-13 23:35:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:28,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:29,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:29,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:35:29,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:29,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-13 23:35:29,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:29,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:29,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 23:35:29,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:35:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:30,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:30,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:30,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:30,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:30,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:30,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:30,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:30,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:30,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:30,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:30,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:30,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:30,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65111884] [2020-10-13 23:35:30,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:30,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 23:35:30,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088975852] [2020-10-13 23:35:30,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 23:35:30,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 23:35:30,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 23:35:30,875 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 52 states. [2020-10-13 23:35:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:31,057 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-13 23:35:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 23:35:31,058 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 61 [2020-10-13 23:35:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:31,059 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:35:31,059 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:35:31,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 23:35:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:35:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 23:35:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:35:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-13 23:35:31,064 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2020-10-13 23:35:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:31,065 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-13 23:35:31,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 23:35:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-13 23:35:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:35:31,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:31,066 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:31,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 23:35:31,066 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash 791136878, now seen corresponding path program 49 times [2020-10-13 23:35:31,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:31,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856947494] [2020-10-13 23:35:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:31,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:31,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:31,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:35:31,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:31,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-13 23:35:31,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:31,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:31,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 23:35:31,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:31,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:35:31,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:33,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:33,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:33,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:33,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:33,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:33,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:33,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:33,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:33,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:33,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856947494] [2020-10-13 23:35:33,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:33,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 23:35:33,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437085089] [2020-10-13 23:35:33,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 23:35:33,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:33,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 23:35:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 23:35:33,344 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 53 states. [2020-10-13 23:35:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:33,615 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-13 23:35:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 23:35:33,615 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2020-10-13 23:35:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:33,617 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:35:33,617 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:35:33,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 23:35:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:35:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 23:35:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:35:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-13 23:35:33,621 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2020-10-13 23:35:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:33,622 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-13 23:35:33,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 23:35:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-13 23:35:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:35:33,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:33,623 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:33,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 23:35:33,623 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 959328050, now seen corresponding path program 50 times [2020-10-13 23:35:33,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:33,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648382046] [2020-10-13 23:35:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:33,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:34,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:35:34,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:36,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:36,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:36,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:36,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:36,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:36,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:36,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:36,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:36,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:36,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648382046] [2020-10-13 23:35:36,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:36,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 23:35:36,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450728725] [2020-10-13 23:35:36,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 23:35:36,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:36,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 23:35:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 23:35:36,157 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 54 states. [2020-10-13 23:35:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:36,361 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-13 23:35:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 23:35:36,362 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 63 [2020-10-13 23:35:36,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:36,362 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:35:36,362 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:35:36,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 23:35:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:35:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 23:35:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:35:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-13 23:35:36,371 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 63 [2020-10-13 23:35:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:36,372 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-13 23:35:36,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 23:35:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-13 23:35:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:35:36,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:36,373 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:36,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 23:35:36,373 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1878287086, now seen corresponding path program 51 times [2020-10-13 23:35:36,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:36,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24527008] [2020-10-13 23:35:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:36,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:37,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:37,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:35:37,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:37,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 907 [2020-10-13 23:35:37,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:37,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:37,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 23:35:37,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:37,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:35:37,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:38,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:38,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:38,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:38,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:38,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:38,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:38,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:38,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:38,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:38,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:38,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24527008] [2020-10-13 23:35:38,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:38,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 23:35:38,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395674613] [2020-10-13 23:35:38,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 23:35:38,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:38,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 23:35:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 23:35:38,859 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 55 states. [2020-10-13 23:35:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:39,144 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-13 23:35:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 23:35:39,145 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 64 [2020-10-13 23:35:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:39,146 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:35:39,146 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:35:39,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 23:35:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:35:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 23:35:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:35:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 23:35:39,151 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2020-10-13 23:35:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:39,152 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 23:35:39,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 23:35:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 23:35:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:35:39,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:39,153 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:39,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 23:35:39,153 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:39,154 INFO L82 PathProgramCache]: Analyzing trace with hash 301246130, now seen corresponding path program 52 times [2020-10-13 23:35:39,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:39,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041165338] [2020-10-13 23:35:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:39,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:40,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:40,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:35:40,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-13 23:35:40,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:40,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 23:35:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:35:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:41,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:41,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:41,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:41,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:41,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:41,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:41,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:41,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:41,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:41,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:41,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:41,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:41,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041165338] [2020-10-13 23:35:41,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:41,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 23:35:41,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932522944] [2020-10-13 23:35:41,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 23:35:41,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 23:35:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 23:35:41,746 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 56 states. [2020-10-13 23:35:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:42,019 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-13 23:35:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 23:35:42,020 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 65 [2020-10-13 23:35:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:42,021 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:35:42,021 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:35:42,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 23:35:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:35:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 23:35:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:35:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-13 23:35:42,025 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2020-10-13 23:35:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:42,025 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-13 23:35:42,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 23:35:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-13 23:35:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:35:42,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:42,026 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:42,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 23:35:42,026 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1342383250, now seen corresponding path program 53 times [2020-10-13 23:35:42,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:42,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314570894] [2020-10-13 23:35:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:43,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:43,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:35:43,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:43,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-13 23:35:43,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:43,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:43,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 23:35:43,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:43,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:35:43,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:44,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:44,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:44,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:44,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:44,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:44,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:44,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:44,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:44,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314570894] [2020-10-13 23:35:44,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:44,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 23:35:44,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500974087] [2020-10-13 23:35:44,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 23:35:44,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:44,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 23:35:44,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 23:35:44,995 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 57 states. [2020-10-13 23:35:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:45,093 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-13 23:35:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 23:35:45,093 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 66 [2020-10-13 23:35:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:45,094 INFO L225 Difference]: With dead ends: 83 [2020-10-13 23:35:45,095 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 23:35:45,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 23:35:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 23:35:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 23:35:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:35:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-13 23:35:45,099 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-13 23:35:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:45,099 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-13 23:35:45,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 23:35:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-13 23:35:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:35:45,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:45,100 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:45,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 23:35:45,101 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash -755286478, now seen corresponding path program 54 times [2020-10-13 23:35:45,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:45,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500639383] [2020-10-13 23:35:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:45,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:46,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:46,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:35:46,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:46,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1246 [2020-10-13 23:35:46,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:46,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 23:35:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:35:46,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:48,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:48,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:48,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:48,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:48,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:48,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:48,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:48,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:48,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:48,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:48,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:48,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500639383] [2020-10-13 23:35:48,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:48,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 23:35:48,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507266500] [2020-10-13 23:35:48,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 23:35:48,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 23:35:48,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 23:35:48,102 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 58 states. [2020-10-13 23:35:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:48,380 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-13 23:35:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 23:35:48,381 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 67 [2020-10-13 23:35:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:48,382 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:35:48,382 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:35:48,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 23:35:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:35:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-13 23:35:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:35:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-13 23:35:48,387 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 67 [2020-10-13 23:35:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:48,387 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-13 23:35:48,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 23:35:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-13 23:35:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:35:48,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:48,388 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:48,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 23:35:48,389 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:48,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:48,389 INFO L82 PathProgramCache]: Analyzing trace with hash 264844270, now seen corresponding path program 55 times [2020-10-13 23:35:48,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:48,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276984127] [2020-10-13 23:35:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:48,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:49,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:49,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:35:49,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:49,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-13 23:35:49,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:49,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 23:35:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 23:35:49,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:51,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:51,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:51,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:51,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:51,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:51,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:51,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:51,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:51,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:51,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:51,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:51,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:51,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276984127] [2020-10-13 23:35:51,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:51,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 23:35:51,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477507272] [2020-10-13 23:35:51,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 23:35:51,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:51,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 23:35:51,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 23:35:51,275 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 59 states. [2020-10-13 23:35:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:51,580 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-13 23:35:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 23:35:51,580 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 68 [2020-10-13 23:35:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:51,582 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:35:51,582 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:35:51,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 23:35:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:35:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 23:35:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:35:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-13 23:35:51,586 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2020-10-13 23:35:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:51,587 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-13 23:35:51,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 23:35:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-13 23:35:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:35:51,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:51,588 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:51,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 23:35:51,588 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1824126386, now seen corresponding path program 56 times [2020-10-13 23:35:51,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:51,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479679874] [2020-10-13 23:35:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:52,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:52,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:35:52,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:52,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-13 23:35:52,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:52,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:52,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 23:35:52,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:52,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:35:52,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:54,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:54,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:54,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:54,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:54,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:54,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:54,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:54,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:54,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:54,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479679874] [2020-10-13 23:35:54,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:54,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 23:35:54,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237248594] [2020-10-13 23:35:54,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 23:35:54,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:54,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 23:35:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 23:35:54,578 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 60 states. [2020-10-13 23:35:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:54,757 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-13 23:35:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 23:35:54,758 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 69 [2020-10-13 23:35:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:54,759 INFO L225 Difference]: With dead ends: 86 [2020-10-13 23:35:54,760 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 23:35:54,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 23:35:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 23:35:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 23:35:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:35:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-13 23:35:54,763 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2020-10-13 23:35:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:54,763 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-13 23:35:54,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 23:35:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-13 23:35:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:35:54,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:54,764 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:54,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 23:35:54,765 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1377735570, now seen corresponding path program 57 times [2020-10-13 23:35:54,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:54,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850739366] [2020-10-13 23:35:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:54,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:55,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:55,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:35:55,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:55,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-13 23:35:55,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:55,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:55,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 23:35:55,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:35:55,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:57,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:57,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:57,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:57,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:57,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:57,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:57,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:57,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:35:57,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850739366] [2020-10-13 23:35:57,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:57,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 23:35:57,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091408643] [2020-10-13 23:35:57,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 23:35:57,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 23:35:57,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 23:35:57,868 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 61 states. [2020-10-13 23:35:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:58,190 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-13 23:35:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 23:35:58,191 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 70 [2020-10-13 23:35:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:58,192 INFO L225 Difference]: With dead ends: 87 [2020-10-13 23:35:58,192 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:35:58,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 23:35:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:35:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 23:35:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:35:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 23:35:58,196 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2020-10-13 23:35:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:58,196 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 23:35:58,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 23:35:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 23:35:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:35:58,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:58,197 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:58,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 23:35:58,197 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1851208398, now seen corresponding path program 58 times [2020-10-13 23:35:58,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:58,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188377892] [2020-10-13 23:35:58,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:58,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:59,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:59,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:35:59,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:59,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1174 [2020-10-13 23:35:59,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:59,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:59,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 23:35:59,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:59,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:35:59,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:01,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:01,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:01,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:01,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:01,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:01,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:01,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:01,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:01,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:01,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:01,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:01,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:01,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188377892] [2020-10-13 23:36:01,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:01,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 23:36:01,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198560276] [2020-10-13 23:36:01,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 23:36:01,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:01,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 23:36:01,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 23:36:01,420 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 62 states. [2020-10-13 23:36:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:01,740 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-13 23:36:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 23:36:01,741 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 71 [2020-10-13 23:36:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:01,742 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:36:01,742 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:36:01,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 23:36:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:36:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 23:36:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:36:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-13 23:36:01,746 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-13 23:36:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:01,746 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-13 23:36:01,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 23:36:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-13 23:36:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:36:01,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:01,747 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:01,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 23:36:01,747 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash 651003118, now seen corresponding path program 59 times [2020-10-13 23:36:01,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:01,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8676176] [2020-10-13 23:36:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:01,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:02,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:02,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:36:02,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:02,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1217 [2020-10-13 23:36:02,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:02,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:02,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 23:36:02,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:02,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:36:02,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:05,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:05,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:05,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:05,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:05,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:05,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:05,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:05,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:05,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:05,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:05,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:05,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:36:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:05,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8676176] [2020-10-13 23:36:05,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:05,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 23:36:05,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996487146] [2020-10-13 23:36:05,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 23:36:05,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:05,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 23:36:05,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 23:36:05,077 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 63 states. [2020-10-13 23:36:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:05,423 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-13 23:36:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 23:36:05,424 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 72 [2020-10-13 23:36:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:05,425 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:36:05,425 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:36:05,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 23:36:05,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:36:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 23:36:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:36:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-13 23:36:05,429 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2020-10-13 23:36:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:05,430 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-13 23:36:05,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 23:36:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-13 23:36:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:36:05,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:05,431 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:05,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 23:36:05,431 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:05,431 INFO L82 PathProgramCache]: Analyzing trace with hash 910148786, now seen corresponding path program 60 times [2020-10-13 23:36:05,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:05,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205094847] [2020-10-13 23:36:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:05,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:06,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:06,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:36:06,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:06,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-13 23:36:06,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:06,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:06,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 23:36:06,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:06,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:36:06,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:08,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:08,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:08,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:08,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:08,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:08,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:36:08,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:08,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:08,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:08,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:08,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:08,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:08,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205094847] [2020-10-13 23:36:08,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:08,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 23:36:08,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195875426] [2020-10-13 23:36:08,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 23:36:08,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 23:36:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 23:36:08,874 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 64 states. [2020-10-13 23:36:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:09,177 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-13 23:36:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 23:36:09,178 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 73 [2020-10-13 23:36:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:09,179 INFO L225 Difference]: With dead ends: 90 [2020-10-13 23:36:09,179 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:36:09,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 23:36:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:36:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 23:36:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:36:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-13 23:36:09,186 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2020-10-13 23:36:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:09,189 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-13 23:36:09,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 23:36:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-13 23:36:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:36:09,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:09,190 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:09,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 23:36:09,191 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:09,191 INFO L82 PathProgramCache]: Analyzing trace with hash 353729902, now seen corresponding path program 61 times [2020-10-13 23:36:09,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:09,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465786989] [2020-10-13 23:36:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:09,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:10,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:10,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:36:10,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:10,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1447 [2020-10-13 23:36:10,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:10,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 23:36:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 23:36:10,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:12,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:12,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:12,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:12,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:12,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:12,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:12,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:12,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:12,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:12,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465786989] [2020-10-13 23:36:12,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:12,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 23:36:12,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281085750] [2020-10-13 23:36:12,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 23:36:12,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:12,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 23:36:12,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 23:36:12,944 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 65 states. [2020-10-13 23:36:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:13,296 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-13 23:36:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 23:36:13,296 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 74 [2020-10-13 23:36:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:13,298 INFO L225 Difference]: With dead ends: 91 [2020-10-13 23:36:13,298 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:36:13,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 23:36:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:36:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 23:36:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:36:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-13 23:36:13,301 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2020-10-13 23:36:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:13,302 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-13 23:36:13,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 23:36:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-13 23:36:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:36:13,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:13,302 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:13,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 23:36:13,303 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash 284613682, now seen corresponding path program 62 times [2020-10-13 23:36:13,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:13,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651475938] [2020-10-13 23:36:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:13,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:14,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:14,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:36:14,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-13 23:36:14,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:14,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:14,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 23:36:14,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:14,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 23:36:14,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:16,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:16,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:16,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:16,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:16,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:16,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:16,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:16,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:16,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:16,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:16,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:16,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:16,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651475938] [2020-10-13 23:36:16,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:16,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 23:36:16,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350678735] [2020-10-13 23:36:16,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 23:36:16,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 23:36:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 23:36:16,987 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 66 states. [2020-10-13 23:36:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:17,345 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-13 23:36:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 23:36:17,346 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 75 [2020-10-13 23:36:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:17,347 INFO L225 Difference]: With dead ends: 92 [2020-10-13 23:36:17,348 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:36:17,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 23:36:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:36:17,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 23:36:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:36:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-13 23:36:17,352 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2020-10-13 23:36:17,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:17,352 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-13 23:36:17,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 23:36:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-13 23:36:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:36:17,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:17,353 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:17,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 23:36:17,354 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:17,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1857989138, now seen corresponding path program 63 times [2020-10-13 23:36:17,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:17,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062209513] [2020-10-13 23:36:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:18,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:18,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:36:18,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:18,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1401 [2020-10-13 23:36:18,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:18,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 23:36:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:36:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:21,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:21,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:21,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:21,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:21,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:21,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:36:21,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:21,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:21,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:21,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:21,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:21,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:21,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062209513] [2020-10-13 23:36:21,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:21,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 23:36:21,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280645827] [2020-10-13 23:36:21,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 23:36:21,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:21,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 23:36:21,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 23:36:21,132 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 67 states. [2020-10-13 23:36:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:21,483 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-13 23:36:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-13 23:36:21,484 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 76 [2020-10-13 23:36:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:21,485 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:36:21,485 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:36:21,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 23:36:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:36:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 23:36:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:36:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-13 23:36:21,489 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-13 23:36:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:21,489 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-13 23:36:21,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 23:36:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-13 23:36:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:36:21,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:21,490 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:21,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 23:36:21,491 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:21,491 INFO L82 PathProgramCache]: Analyzing trace with hash 440800178, now seen corresponding path program 64 times [2020-10-13 23:36:21,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:21,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217924593] [2020-10-13 23:36:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:21,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:22,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:22,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:36:22,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:22,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-13 23:36:22,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:22,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:22,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-13 23:36:22,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:22,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:36:22,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:25,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:25,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:25,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:25,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:25,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:25,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:25,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:25,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:25,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:25,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:25,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:25,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:25,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217924593] [2020-10-13 23:36:25,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:25,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-13 23:36:25,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759239205] [2020-10-13 23:36:25,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-13 23:36:25,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:25,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-13 23:36:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 23:36:25,448 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 68 states. [2020-10-13 23:36:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:25,808 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-13 23:36:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 23:36:25,809 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 77 [2020-10-13 23:36:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:25,810 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:36:25,810 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:36:25,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 23:36:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:36:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 23:36:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:36:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-13 23:36:25,813 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 77 [2020-10-13 23:36:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:25,814 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-13 23:36:25,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-13 23:36:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-13 23:36:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:36:25,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:25,815 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:25,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 23:36:25,815 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:25,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1311175058, now seen corresponding path program 65 times [2020-10-13 23:36:25,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:25,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182803010] [2020-10-13 23:36:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:25,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:27,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:27,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:36:27,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:27,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1491 [2020-10-13 23:36:27,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:27,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-13 23:36:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 23:36:27,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:29,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:29,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:29,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:29,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:29,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:29,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:29,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:29,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:29,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:29,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:29,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:29,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:29,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182803010] [2020-10-13 23:36:29,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:29,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-13 23:36:29,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765658153] [2020-10-13 23:36:29,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-13 23:36:29,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:29,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-13 23:36:29,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 23:36:29,900 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 69 states. [2020-10-13 23:36:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:30,271 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-13 23:36:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-13 23:36:30,272 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 78 [2020-10-13 23:36:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:30,273 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:36:30,273 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:36:30,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 23:36:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:36:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-13 23:36:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:36:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-13 23:36:30,278 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2020-10-13 23:36:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:30,278 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-13 23:36:30,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-13 23:36:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-13 23:36:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:36:30,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:30,279 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:30,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 23:36:30,280 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:30,280 INFO L82 PathProgramCache]: Analyzing trace with hash 212167474, now seen corresponding path program 66 times [2020-10-13 23:36:30,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:30,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436452939] [2020-10-13 23:36:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:32,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:32,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:36:32,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:32,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-10-13 23:36:32,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:32,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 23:36:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:36:32,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:34,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:34,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:34,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:34,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:34,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:34,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:34,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:34,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:34,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:34,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:34,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:34,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436452939] [2020-10-13 23:36:34,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:34,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-13 23:36:34,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155565607] [2020-10-13 23:36:34,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-13 23:36:34,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:34,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-13 23:36:34,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 23:36:34,699 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 70 states. [2020-10-13 23:36:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:35,076 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-13 23:36:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-13 23:36:35,077 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 79 [2020-10-13 23:36:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:35,078 INFO L225 Difference]: With dead ends: 96 [2020-10-13 23:36:35,078 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:36:35,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 23:36:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:36:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-13 23:36:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:36:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-13 23:36:35,083 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2020-10-13 23:36:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:35,083 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-13 23:36:35,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-13 23:36:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-13 23:36:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:36:35,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:35,084 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:35,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 23:36:35,084 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash 191145710, now seen corresponding path program 67 times [2020-10-13 23:36:35,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:35,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207295053] [2020-10-13 23:36:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:35,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:36,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:36,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:36:36,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:36,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1639 [2020-10-13 23:36:36,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:36,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:36,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 23:36:36,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:36,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 23:36:36,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:39,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:39,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:39,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:39,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:39,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:39,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:39,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:39,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:39,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:39,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207295053] [2020-10-13 23:36:39,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:39,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 23:36:39,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923692365] [2020-10-13 23:36:39,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 23:36:39,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 23:36:39,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 23:36:39,465 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 71 states. [2020-10-13 23:36:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:39,622 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-13 23:36:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-13 23:36:39,622 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 80 [2020-10-13 23:36:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:39,623 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:36:39,624 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:36:39,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 23:36:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:36:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-13 23:36:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:36:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-13 23:36:39,628 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2020-10-13 23:36:39,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:39,628 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-13 23:36:39,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 23:36:39,629 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-13 23:36:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:36:39,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:39,629 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:39,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-13 23:36:39,630 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:39,630 INFO L82 PathProgramCache]: Analyzing trace with hash -460528974, now seen corresponding path program 68 times [2020-10-13 23:36:39,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:39,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941271189] [2020-10-13 23:36:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:39,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:41,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:41,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:36:41,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:41,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1728 [2020-10-13 23:36:41,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:41,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-13 23:36:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:36:41,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:44,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:44,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:44,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:44,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:44,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:44,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:44,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:44,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:44,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:44,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:44,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:36:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:44,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941271189] [2020-10-13 23:36:44,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:44,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-13 23:36:44,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908045007] [2020-10-13 23:36:44,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-13 23:36:44,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:44,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-13 23:36:44,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 23:36:44,184 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 72 states. [2020-10-13 23:36:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:44,461 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-13 23:36:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 23:36:44,462 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 81 [2020-10-13 23:36:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:44,463 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:36:44,463 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:36:44,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 23:36:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:36:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-13 23:36:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 23:36:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-13 23:36:44,467 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-13 23:36:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:44,467 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-13 23:36:44,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-13 23:36:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-13 23:36:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:36:44,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:44,468 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:44,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-13 23:36:44,468 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:44,468 INFO L82 PathProgramCache]: Analyzing trace with hash 812392302, now seen corresponding path program 69 times [2020-10-13 23:36:44,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:44,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157331212] [2020-10-13 23:36:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:46,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:46,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:36:46,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:46,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1721 [2020-10-13 23:36:46,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:46,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-13 23:36:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:36:46,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:49,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:49,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:49,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:49,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:49,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:49,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:36:49,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:49,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:49,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:49,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:49,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157331212] [2020-10-13 23:36:49,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:49,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-13 23:36:49,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054197481] [2020-10-13 23:36:49,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-13 23:36:49,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-13 23:36:49,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 23:36:49,137 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 73 states. [2020-10-13 23:36:49,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:49,540 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-13 23:36:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-13 23:36:49,541 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 82 [2020-10-13 23:36:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:49,542 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:36:49,542 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:36:49,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 23:36:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:36:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 23:36:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:36:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-13 23:36:49,547 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 82 [2020-10-13 23:36:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:49,547 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-13 23:36:49,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-13 23:36:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-13 23:36:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:36:49,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:49,548 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:49,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-13 23:36:49,549 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1618246194, now seen corresponding path program 70 times [2020-10-13 23:36:49,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:49,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844657409] [2020-10-13 23:36:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:51,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:51,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:36:51,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1784 [2020-10-13 23:36:51,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:51,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-13 23:36:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:51,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:36:51,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:54,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:54,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:54,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:54,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:54,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:54,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:54,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:54,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:54,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:54,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:54,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:54,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844657409] [2020-10-13 23:36:54,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:54,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-13 23:36:54,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785190654] [2020-10-13 23:36:54,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-13 23:36:54,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:54,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-13 23:36:54,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 23:36:54,392 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 74 states. [2020-10-13 23:36:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:54,801 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-13 23:36:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-13 23:36:54,802 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 83 [2020-10-13 23:36:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:54,803 INFO L225 Difference]: With dead ends: 100 [2020-10-13 23:36:54,803 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:36:54,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 23:36:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:36:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-13 23:36:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:36:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-13 23:36:54,808 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 83 [2020-10-13 23:36:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:54,808 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-13 23:36:54,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-13 23:36:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-13 23:36:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:36:54,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:54,809 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:54,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-13 23:36:54,809 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:54,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:54,810 INFO L82 PathProgramCache]: Analyzing trace with hash 829913070, now seen corresponding path program 71 times [2020-10-13 23:36:54,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:54,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771920841] [2020-10-13 23:36:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:54,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:56,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:56,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:36:56,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:56,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-13 23:36:56,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:56,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-13 23:36:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 23:36:56,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:59,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:59,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:59,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:59,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:59,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:59,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:59,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:59,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:59,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:36:59,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771920841] [2020-10-13 23:36:59,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:59,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-13 23:36:59,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281626106] [2020-10-13 23:36:59,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-13 23:36:59,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:59,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-13 23:36:59,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 23:36:59,840 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 75 states. [2020-10-13 23:37:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:00,078 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-13 23:37:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-13 23:37:00,079 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 84 [2020-10-13 23:37:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:00,080 INFO L225 Difference]: With dead ends: 101 [2020-10-13 23:37:00,081 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 23:37:00,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 23:37:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 23:37:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-13 23:37:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:37:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-13 23:37:00,085 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2020-10-13 23:37:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:00,086 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-13 23:37:00,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-13 23:37:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-13 23:37:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 23:37:00,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:00,086 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:00,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-13 23:37:00,087 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:00,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2133577294, now seen corresponding path program 72 times [2020-10-13 23:37:00,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:00,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900121761] [2020-10-13 23:37:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:00,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:01,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:02,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:37:02,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:02,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1891 [2020-10-13 23:37:02,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:02,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:02,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-13 23:37:02,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:02,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:37:02,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:05,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:05,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:05,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:05,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:05,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:05,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:05,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:05,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900121761] [2020-10-13 23:37:05,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:05,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-13 23:37:05,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684887625] [2020-10-13 23:37:05,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-13 23:37:05,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-13 23:37:05,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 23:37:05,234 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 76 states. [2020-10-13 23:37:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:05,667 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-13 23:37:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-13 23:37:05,668 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 85 [2020-10-13 23:37:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:05,669 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:37:05,669 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:37:05,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 23:37:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:37:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 23:37:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:37:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-13 23:37:05,674 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2020-10-13 23:37:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:05,674 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-13 23:37:05,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-13 23:37:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-13 23:37:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:37:05,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:05,675 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:05,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-13 23:37:05,675 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash 487501934, now seen corresponding path program 73 times [2020-10-13 23:37:05,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:05,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624752697] [2020-10-13 23:37:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:05,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:07,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:07,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 23:37:07,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:07,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1937 [2020-10-13 23:37:07,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:07,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:07,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-13 23:37:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 23:37:07,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:10,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:10,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:10,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:10,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:10,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:10,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:10,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:10,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:10,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:10,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:10,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:10,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:10,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624752697] [2020-10-13 23:37:10,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:10,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-13 23:37:10,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574119090] [2020-10-13 23:37:10,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-13 23:37:10,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-13 23:37:10,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 23:37:10,976 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 77 states. [2020-10-13 23:37:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:11,126 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-13 23:37:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-13 23:37:11,127 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 86 [2020-10-13 23:37:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:11,128 INFO L225 Difference]: With dead ends: 103 [2020-10-13 23:37:11,128 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:37:11,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 23:37:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:37:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-13 23:37:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:37:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-13 23:37:11,133 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2020-10-13 23:37:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:11,134 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-13 23:37:11,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-13 23:37:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-13 23:37:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:37:11,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:11,135 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:11,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-13 23:37:11,135 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 136579378, now seen corresponding path program 74 times [2020-10-13 23:37:11,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:11,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927844963] [2020-10-13 23:37:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:11,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:13,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:13,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:37:13,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:13,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1945 [2020-10-13 23:37:13,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:13,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:13,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-13 23:37:13,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:13,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 23:37:13,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:16,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:16,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:16,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:16,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:16,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:16,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:16,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:16,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:16,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:16,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:16,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927844963] [2020-10-13 23:37:16,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:16,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-13 23:37:16,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710802210] [2020-10-13 23:37:16,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-13 23:37:16,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-13 23:37:16,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 23:37:16,569 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 78 states. [2020-10-13 23:37:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:16,961 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-13 23:37:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-13 23:37:16,962 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 87 [2020-10-13 23:37:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:16,963 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:37:16,963 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:37:16,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 23:37:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:37:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-13 23:37:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:37:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-13 23:37:16,967 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 87 [2020-10-13 23:37:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:16,967 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-13 23:37:16,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-13 23:37:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-13 23:37:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 23:37:16,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:16,968 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:16,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-13 23:37:16,968 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2142882030, now seen corresponding path program 75 times [2020-10-13 23:37:16,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:16,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507505982] [2020-10-13 23:37:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:17,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:19,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:19,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 23:37:19,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:19,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2034 [2020-10-13 23:37:19,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:19,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-13 23:37:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:37:19,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:22,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:22,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:22,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:22,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:22,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:22,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:22,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:22,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:22,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:22,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:22,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:22,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507505982] [2020-10-13 23:37:22,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:22,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-13 23:37:22,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838250854] [2020-10-13 23:37:22,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-13 23:37:22,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:22,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-13 23:37:22,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 23:37:22,589 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 79 states. [2020-10-13 23:37:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:23,055 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-13 23:37:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-13 23:37:23,056 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 88 [2020-10-13 23:37:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:23,057 INFO L225 Difference]: With dead ends: 105 [2020-10-13 23:37:23,057 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:37:23,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 23:37:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:37:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-13 23:37:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:37:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-10-13 23:37:23,062 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2020-10-13 23:37:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:23,063 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-10-13 23:37:23,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-13 23:37:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-10-13 23:37:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:37:23,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:23,063 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:23,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-13 23:37:23,064 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash -86245198, now seen corresponding path program 76 times [2020-10-13 23:37:23,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:23,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429907077] [2020-10-13 23:37:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:23,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:25,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:25,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:37:25,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:25,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2080 [2020-10-13 23:37:25,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:25,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:25,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-13 23:37:25,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:25,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 23:37:25,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:28,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:28,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:28,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:28,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:28,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:28,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:28,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:28,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:28,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:28,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:28,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:28,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:28,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429907077] [2020-10-13 23:37:28,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:28,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-13 23:37:28,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229889382] [2020-10-13 23:37:28,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-13 23:37:28,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-13 23:37:28,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2020-10-13 23:37:28,841 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 80 states. [2020-10-13 23:37:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:29,264 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-13 23:37:29,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-13 23:37:29,264 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 89 [2020-10-13 23:37:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:29,266 INFO L225 Difference]: With dead ends: 106 [2020-10-13 23:37:29,266 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:37:29,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2020-10-13 23:37:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:37:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 23:37:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 23:37:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-13 23:37:29,269 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2020-10-13 23:37:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:29,270 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-13 23:37:29,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-13 23:37:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-13 23:37:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 23:37:29,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:29,270 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:29,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-13 23:37:29,271 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash -469712530, now seen corresponding path program 77 times [2020-10-13 23:37:29,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:29,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419974798] [2020-10-13 23:37:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:29,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:31,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2120 [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 23:37:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:35,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:35,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:35,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:35,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:35,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:35,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:37:35,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:35,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:35,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:35,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:35,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419974798] [2020-10-13 23:37:35,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:35,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-13 23:37:35,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473724655] [2020-10-13 23:37:35,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-13 23:37:35,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-13 23:37:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 23:37:35,186 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 81 states. [2020-10-13 23:37:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:35,386 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-10-13 23:37:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-13 23:37:35,386 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 90 [2020-10-13 23:37:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:35,388 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:37:35,388 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:37:35,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 23:37:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:37:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-13 23:37:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:37:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-10-13 23:37:35,391 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2020-10-13 23:37:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:35,391 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-10-13 23:37:35,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-13 23:37:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-10-13 23:37:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:37:35,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:35,392 INFO L422 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:35,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-13 23:37:35,392 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash 527702066, now seen corresponding path program 78 times [2020-10-13 23:37:35,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:35,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773656694] [2020-10-13 23:37:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:35,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:37,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:37,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:37:37,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:37,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2265 [2020-10-13 23:37:37,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:37,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:37,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-13 23:37:37,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:37,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:37:37,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:41,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:41,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:41,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:41,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:41,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:41,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:41,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:41,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:41,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773656694] [2020-10-13 23:37:41,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:41,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-13 23:37:41,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147602322] [2020-10-13 23:37:41,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-13 23:37:41,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-13 23:37:41,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 23:37:41,571 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 82 states. [2020-10-13 23:37:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:42,048 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-13 23:37:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-13 23:37:42,048 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 91 [2020-10-13 23:37:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:42,050 INFO L225 Difference]: With dead ends: 108 [2020-10-13 23:37:42,050 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:37:42,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 23:37:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:37:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 23:37:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:37:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-13 23:37:42,055 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 91 [2020-10-13 23:37:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:42,056 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-13 23:37:42,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-13 23:37:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-13 23:37:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:37:42,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:42,057 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:42,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-13 23:37:42,057 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1382783470, now seen corresponding path program 79 times [2020-10-13 23:37:42,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:42,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478365723] [2020-10-13 23:37:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:42,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:44,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:44,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:37:44,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:44,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2339 [2020-10-13 23:37:44,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:44,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-13 23:37:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 23:37:44,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:48,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:48,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:48,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:48,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:48,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:37:48,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:48,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:48,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:48,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478365723] [2020-10-13 23:37:48,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:48,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-13 23:37:48,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454352767] [2020-10-13 23:37:48,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-13 23:37:48,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:48,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-13 23:37:48,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 23:37:48,399 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 83 states. [2020-10-13 23:37:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:48,724 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-10-13 23:37:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-13 23:37:48,725 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 92 [2020-10-13 23:37:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:48,726 INFO L225 Difference]: With dead ends: 109 [2020-10-13 23:37:48,726 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 23:37:48,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 23:37:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 23:37:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-13 23:37:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:37:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-10-13 23:37:48,731 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 92 [2020-10-13 23:37:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:48,732 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-10-13 23:37:48,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-13 23:37:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-10-13 23:37:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 23:37:48,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:48,733 INFO L422 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:48,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-13 23:37:48,733 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2120503218, now seen corresponding path program 80 times [2020-10-13 23:37:48,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:48,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705952771] [2020-10-13 23:37:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:48,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:51,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:51,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:37:51,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:51,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2673 [2020-10-13 23:37:51,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:51,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:51,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-13 23:37:51,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:51,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 23:37:51,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:55,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:55,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:55,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:55,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:55,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:55,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:55,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:55,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:55,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:55,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:55,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:55,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:37:55,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705952771] [2020-10-13 23:37:55,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:55,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-13 23:37:55,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690821873] [2020-10-13 23:37:55,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-13 23:37:55,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:55,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-13 23:37:55,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2020-10-13 23:37:55,514 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 84 states. [2020-10-13 23:37:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:55,721 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2020-10-13 23:37:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-13 23:37:55,722 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 93 [2020-10-13 23:37:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:55,723 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:37:55,724 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:37:55,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2020-10-13 23:37:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:37:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-13 23:37:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 23:37:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-13 23:37:55,728 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 93 [2020-10-13 23:37:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:55,728 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-13 23:37:55,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-13 23:37:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-13 23:37:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 23:37:55,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:55,729 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:55,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-13 23:37:55,729 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:55,730 INFO L82 PathProgramCache]: Analyzing trace with hash -779988370, now seen corresponding path program 81 times [2020-10-13 23:37:55,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:55,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211491239] [2020-10-13 23:37:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:55,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:58,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:58,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 23:37:58,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:58,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2543 [2020-10-13 23:37:58,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:58,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-13 23:37:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 23:37:58,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:02,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:02,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:02,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:02,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:02,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:02,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:02,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:02,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:02,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211491239] [2020-10-13 23:38:02,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:02,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-13 23:38:02,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185010080] [2020-10-13 23:38:02,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-13 23:38:02,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-13 23:38:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2020-10-13 23:38:02,469 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 85 states. [2020-10-13 23:38:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:02,983 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-13 23:38:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-13 23:38:02,984 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 94 [2020-10-13 23:38:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:02,985 INFO L225 Difference]: With dead ends: 111 [2020-10-13 23:38:02,986 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 23:38:02,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2020-10-13 23:38:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 23:38:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 23:38:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:38:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-13 23:38:02,991 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 94 [2020-10-13 23:38:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:02,991 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-13 23:38:02,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-13 23:38:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-13 23:38:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:38:02,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:02,992 INFO L422 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:02,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-13 23:38:02,993 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash -500914382, now seen corresponding path program 82 times [2020-10-13 23:38:02,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:02,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995093174] [2020-10-13 23:38:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:03,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:05,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:05,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:38:05,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:05,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2529 [2020-10-13 23:38:05,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:05,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:05,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-13 23:38:05,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:05,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 23:38:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:09,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:09,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:09,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:09,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:09,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:09,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:38:09,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:09,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:09,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:09,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995093174] [2020-10-13 23:38:09,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:09,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-13 23:38:09,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873126624] [2020-10-13 23:38:09,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-13 23:38:09,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:09,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-13 23:38:09,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2020-10-13 23:38:09,908 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 86 states. [2020-10-13 23:38:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:10,396 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-10-13 23:38:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-13 23:38:10,397 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 95 [2020-10-13 23:38:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:10,398 INFO L225 Difference]: With dead ends: 112 [2020-10-13 23:38:10,398 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:38:10,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2020-10-13 23:38:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:38:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-13 23:38:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:38:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-13 23:38:10,402 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 95 [2020-10-13 23:38:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:10,403 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-13 23:38:10,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-13 23:38:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-13 23:38:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 23:38:10,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:10,403 INFO L422 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:10,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-13 23:38:10,404 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:10,404 INFO L82 PathProgramCache]: Analyzing trace with hash -439555346, now seen corresponding path program 83 times [2020-10-13 23:38:10,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:10,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480634839] [2020-10-13 23:38:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:10,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:13,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:13,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 23:38:13,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:13,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2582 [2020-10-13 23:38:13,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:13,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:13,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-13 23:38:13,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:13,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 23:38:13,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:17,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:17,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:17,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:17,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:38:17,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:17,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:17,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:17,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:17,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:17,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:17,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480634839] [2020-10-13 23:38:17,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:17,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-10-13 23:38:17,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707913667] [2020-10-13 23:38:17,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-13 23:38:17,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:17,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-13 23:38:17,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2020-10-13 23:38:17,510 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 87 states. [2020-10-13 23:38:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:17,900 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-10-13 23:38:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-13 23:38:17,901 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 96 [2020-10-13 23:38:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:17,902 INFO L225 Difference]: With dead ends: 113 [2020-10-13 23:38:17,902 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:38:17,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2020-10-13 23:38:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:38:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-13 23:38:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:38:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-13 23:38:17,907 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-10-13 23:38:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:17,907 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-13 23:38:17,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-13 23:38:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-13 23:38:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:38:17,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:17,908 INFO L422 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:17,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-13 23:38:17,908 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1462574770, now seen corresponding path program 84 times [2020-10-13 23:38:17,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:17,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640027814] [2020-10-13 23:38:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:17,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:20,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:38:20,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:20,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2594 [2020-10-13 23:38:20,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:20,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:20,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-13 23:38:20,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:20,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:38:20,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:25,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:25,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:25,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:25,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:25,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:25,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:25,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:25,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:25,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:25,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:25,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:25,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:25,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640027814] [2020-10-13 23:38:25,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:25,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-13 23:38:25,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383020575] [2020-10-13 23:38:25,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-13 23:38:25,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:25,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-13 23:38:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2020-10-13 23:38:25,192 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 88 states. [2020-10-13 23:38:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:25,493 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-13 23:38:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-13 23:38:25,494 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 97 [2020-10-13 23:38:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:25,495 INFO L225 Difference]: With dead ends: 114 [2020-10-13 23:38:25,495 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:38:25,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2020-10-13 23:38:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:38:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-13 23:38:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:38:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-13 23:38:25,500 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 97 [2020-10-13 23:38:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:25,500 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-13 23:38:25,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-13 23:38:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-13 23:38:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 23:38:25,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:25,501 INFO L422 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:25,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-13 23:38:25,501 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash 299066222, now seen corresponding path program 85 times [2020-10-13 23:38:25,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:25,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081826636] [2020-10-13 23:38:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat