/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_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:30:25,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:30:25,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:30:25,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:30:25,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:30:25,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:30:25,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:30:25,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:30:25,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:30:25,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:30:25,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:30:25,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:30:25,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:30:25,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:30:25,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:30:25,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:30:25,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:30:25,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:30:25,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:30:25,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:30:25,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:30:25,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:30:25,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:30:25,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:30:25,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:30:25,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:30:25,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:30:25,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:30:25,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:30:25,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:30:25,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:30:25,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:30:25,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:30:25,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:30:25,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:30:25,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:30:25,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:30:25,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:30:25,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:30:25,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:30:25,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:30:25,240 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 23:30:25,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:30:25,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:30:25,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:30:25,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:30:25,272 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:30:25,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:30:25,272 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:30:25,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:30:25,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:30:25,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:30:25,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:30:25,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:30:25,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:30:25,274 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:30:25,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:30:25,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:30:25,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:30:25,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:30:25,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:30:25,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:30:25,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:30:25,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:30:25,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:30:25,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:30:25,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:30:25,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:30:25,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:30:25,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:30:25,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:30:25,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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 23:30:25,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:30:25,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:30:25,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:30:25,588 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:30:25,589 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:30:25,589 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-13 23:30:25,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f89018b4a/eeb598a8449244dbacdf0f272920154a/FLAGe6c0beb56 [2020-10-13 23:30:26,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:30:26,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-13 23:30:26,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f89018b4a/eeb598a8449244dbacdf0f272920154a/FLAGe6c0beb56 [2020-10-13 23:30:26,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f89018b4a/eeb598a8449244dbacdf0f272920154a [2020-10-13 23:30:26,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:30:26,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:30:26,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:26,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:30:26,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:30:26,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b93891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26, skipping insertion in model container [2020-10-13 23:30:26,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:30:26,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:30:26,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:26,725 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:30:26,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:26,768 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:30:26,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26 WrapperNode [2020-10-13 23:30:26,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:26,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:30:26,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:30:26,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:30:26,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (1/1) ... [2020-10-13 23:30:26,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:30:26,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:30:26,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:30:26,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:30:26,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (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 23:30:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:30:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:30:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:30:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:30:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:30:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:30:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:30:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:30:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:30:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:30:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:30:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:30:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:30:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:30:27,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:30:27,228 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 23:30:27,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:27 BoogieIcfgContainer [2020-10-13 23:30:27,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:30:27,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:30:27,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:30:27,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:30:27,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:30:26" (1/3) ... [2020-10-13 23:30:27,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e783d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:27, skipping insertion in model container [2020-10-13 23:30:27,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:26" (2/3) ... [2020-10-13 23:30:27,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e783d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:27, skipping insertion in model container [2020-10-13 23:30:27,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:27" (3/3) ... [2020-10-13 23:30:27,240 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2020-10-13 23:30:27,252 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:30:27,261 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:30:27,288 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:30:27,350 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:30:27,351 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:30:27,351 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:30:27,351 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:30:27,351 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:30:27,351 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:30:27,351 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:30:27,351 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:30:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 23:30:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:30:27,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:27,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:27,379 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:27,385 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2020-10-13 23:30:27,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:27,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666496153] [2020-10-13 23:30:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:27,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:27,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:27,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:30:28,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:30:28,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-13 23:30:28,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:30:28,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:30:28,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:28,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:28,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:30:28,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:28,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:28,173 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 23:30:28,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666496153] [2020-10-13 23:30:28,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:28,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:30:28,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160203206] [2020-10-13 23:30:28,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:30:28,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:28,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:30:28,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:28,199 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 23:30:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:28,322 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-10-13 23:30:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:30:28,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-13 23:30:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:28,334 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:30:28,334 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:30:28,338 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 23:30:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:30:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 23:30:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:30:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 23:30:28,379 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-13 23:30:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:28,380 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 23:30:28,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:30:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 23:30:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:30:28,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:28,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:28,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:30:28,382 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:28,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:28,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1263989582, now seen corresponding path program 1 times [2020-10-13 23:30:28,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:28,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116532160] [2020-10-13 23:30:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:30:28,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:30:28,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-13 23:30:28,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:28,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:30:28,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:28,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:30:28,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:28,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:28,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:30:28,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:28,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:28,858 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 23:30:28,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116532160] [2020-10-13 23:30:28,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:28,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:28,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815312921] [2020-10-13 23:30:28,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:28,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:28,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:28,867 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-10-13 23:30:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:28,984 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-13 23:30:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:28,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 23:30:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:28,987 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:30:28,987 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:30:28,989 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 23:30:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:30:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-13 23:30:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:30:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-13 23:30:29,000 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-10-13 23:30:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:29,000 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-13 23:30:29,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-13 23:30:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:30:29,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:29,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:29,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:30:29,004 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1711436712, now seen corresponding path program 1 times [2020-10-13 23:30:29,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:29,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146101104] [2020-10-13 23:30:29,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:29,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:29,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:29,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:29,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:30,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:30,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:30,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:30:30,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:30:30,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1696 [2020-10-13 23:30:30,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:30,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:30,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:30,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:30,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:30,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:30,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:30,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:30,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:30,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:30,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:30,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:30,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 23:30:30,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146101104] [2020-10-13 23:30:30,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:30,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:30,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624428007] [2020-10-13 23:30:30,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:30,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:30,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:30,766 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-10-13 23:30:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:30,849 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-13 23:30:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:30,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-13 23:30:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:30,852 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:30:30,852 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 23:30:30,853 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 23:30:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 23:30:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 23:30:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:30:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 23:30:30,861 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2020-10-13 23:30:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:30,861 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 23:30:30,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 23:30:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:30:30,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:30,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:30,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:30:30,863 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:30,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:30,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458438, now seen corresponding path program 1 times [2020-10-13 23:30:30,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:30,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991544099] [2020-10-13 23:30:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:30,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:30,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:30,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:30,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:32,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:33,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:30:33,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:30:33,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2496 [2020-10-13 23:30:33,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:33,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:30:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:30:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:30:33,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:33,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:33,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:33,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:33,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:33,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:33,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:33,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 23:30:33,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991544099] [2020-10-13 23:30:33,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:33,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:30:33,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685951748] [2020-10-13 23:30:33,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:30:33,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:33,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:30:33,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:33,423 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-10-13 23:30:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:33,533 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-13 23:30:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:30:33,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-13 23:30:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:33,535 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:30:33,536 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:30:33,536 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 23:30:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:30:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-13 23:30:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:30:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 23:30:33,544 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-10-13 23:30:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:33,545 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 23:30:33,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:30:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 23:30:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:30:33,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:33,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:33,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:30:33,547 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:33,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1864129440, now seen corresponding path program 2 times [2020-10-13 23:30:33,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:33,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978450826] [2020-10-13 23:30:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:33,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:36,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:38,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:30:38,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:30:38,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:30:38,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:38,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:30:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:30:38,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:30:38,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:38,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:38,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:38,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:38,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:38,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:38,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:38,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:38,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:38,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:38,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:30:38,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978450826] [2020-10-13 23:30:38,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:38,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:30:38,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731484137] [2020-10-13 23:30:38,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:30:38,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:30:38,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:30:38,623 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2020-10-13 23:30:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:38,760 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-13 23:30:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:30:38,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-13 23:30:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:38,763 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:30:38,763 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 23:30:38,764 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 23:30:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 23:30:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-13 23:30:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:30:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-13 23:30:38,772 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2020-10-13 23:30:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:38,772 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-13 23:30:38,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:30:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-13 23:30:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:30:38,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:38,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:38,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:30:38,775 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1651005050, now seen corresponding path program 3 times [2020-10-13 23:30:38,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:38,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537047269] [2020-10-13 23:30:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:38,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:43,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:30:43,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:30:43,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:30:43,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:43,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:30:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:30:43,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:43,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:43,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:43,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:43,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:43,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:30:43,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:43,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:43,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:43,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:30:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 23:30:43,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537047269] [2020-10-13 23:30:43,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:43,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:30:43,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502547204] [2020-10-13 23:30:43,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:30:43,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:30:43,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:43,888 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-10-13 23:30:44,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:44,018 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-13 23:30:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:30:44,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-13 23:30:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:44,021 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:30:44,022 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 23:30:44,023 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 23:30:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 23:30:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 23:30:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:30:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 23:30:44,037 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2020-10-13 23:30:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:44,039 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 23:30:44,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:30:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 23:30:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:30:44,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:44,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:44,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:30:44,042 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:44,043 INFO L82 PathProgramCache]: Analyzing trace with hash -808703080, now seen corresponding path program 4 times [2020-10-13 23:30:44,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:44,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716610792] [2020-10-13 23:30:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:49,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:30:49,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:30:49,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:30:49,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:49,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:30:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:30:49,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:30:49,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:49,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:49,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:49,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:49,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:49,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:49,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:49,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:49,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:49,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:49,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 23:30:49,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716610792] [2020-10-13 23:30:49,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:49,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:30:49,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548077543] [2020-10-13 23:30:49,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:30:49,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:30:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:30:49,135 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-10-13 23:30:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:49,302 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-13 23:30:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:30:49,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-13 23:30:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:49,304 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:30:49,304 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:30:49,305 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 23:30:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:30:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-13 23:30:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:30:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-13 23:30:49,316 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2020-10-13 23:30:49,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:49,316 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-13 23:30:49,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:30:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-13 23:30:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:30:49,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:49,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:49,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:30:49,321 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1472852878, now seen corresponding path program 5 times [2020-10-13 23:30:49,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:49,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139512036] [2020-10-13 23:30:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:49,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:54,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:30:54,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:30:54,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:30:54,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:54,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:54,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:30:54,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:30:54,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:54,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:54,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:54,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:54,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:54,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:54,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:54,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:54,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:54,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:54,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:54,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 23:30:54,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139512036] [2020-10-13 23:30:54,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:54,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:30:54,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401443210] [2020-10-13 23:30:54,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:30:54,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:30:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:30:54,400 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 6 states. [2020-10-13 23:30:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:54,474 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-13 23:30:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:30:54,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-13 23:30:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:54,476 INFO L225 Difference]: With dead ends: 96 [2020-10-13 23:30:54,476 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:30:54,477 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 23:30:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:30:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 23:30:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:30:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-13 23:30:54,484 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 47 [2020-10-13 23:30:54,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:54,485 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-13 23:30:54,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:30:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-13 23:30:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:30:54,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:54,486 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:54,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:30:54,487 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:54,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1392108432, now seen corresponding path program 6 times [2020-10-13 23:30:54,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:54,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534633045] [2020-10-13 23:30:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:59,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:30:59,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:30:59,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 23:30:59,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:59,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:30:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:30:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:30:59,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:59,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:59,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:59,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:59,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:59,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:59,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:59,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:59,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:59,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:59,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-13 23:30:59,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534633045] [2020-10-13 23:30:59,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:59,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:30:59,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634865553] [2020-10-13 23:30:59,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:30:59,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:59,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:30:59,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:30:59,616 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 8 states. [2020-10-13 23:30:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:59,776 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2020-10-13 23:30:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:30:59,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-13 23:30:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:59,777 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:30:59,777 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 23:30:59,781 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 23:30:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 23:30:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-10-13 23:30:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:30:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-13 23:30:59,791 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 49 [2020-10-13 23:30:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:59,793 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-13 23:30:59,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:30:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-13 23:30:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:30:59,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:59,795 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:59,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:30:59,797 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:59,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:59,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1131697558, now seen corresponding path program 7 times [2020-10-13 23:30:59,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:59,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705904485] [2020-10-13 23:30:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:59,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:04,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:31:04,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:31:04,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:04,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:31:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:04,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:04,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:04,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:04,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:04,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:04,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:04,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:04,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:04,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-10-13 23:31:04,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705904485] [2020-10-13 23:31:04,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:04,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:04,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526568058] [2020-10-13 23:31:04,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:04,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:04,897 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 9 states. [2020-10-13 23:31:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:05,081 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2020-10-13 23:31:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:05,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-13 23:31:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:05,083 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:31:05,083 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:31:05,085 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 23:31:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:31:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-13 23:31:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:31:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-13 23:31:05,097 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 55 [2020-10-13 23:31:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:05,097 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-13 23:31:05,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-13 23:31:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:31:05,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:05,099 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:05,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:31:05,101 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1423648196, now seen corresponding path program 8 times [2020-10-13 23:31:05,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:05,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701078211] [2020-10-13 23:31:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:06,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:10,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:31:10,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:10,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:31:10,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:10,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:10,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:10,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:10,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:10,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:10,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:10,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:10,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:10,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:10,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:10,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:10,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:10,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 23:31:10,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701078211] [2020-10-13 23:31:10,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:10,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:10,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697237838] [2020-10-13 23:31:10,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:10,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:10,192 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 7 states. [2020-10-13 23:31:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:10,283 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-13 23:31:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:10,284 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-13 23:31:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:10,285 INFO L225 Difference]: With dead ends: 122 [2020-10-13 23:31:10,285 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:31:10,286 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 23:31:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:31:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 23:31:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:31:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-13 23:31:10,295 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 61 [2020-10-13 23:31:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:10,301 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-13 23:31:10,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-13 23:31:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:31:10,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:10,302 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:10,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:31:10,304 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1011953762, now seen corresponding path program 9 times [2020-10-13 23:31:10,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:10,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908614708] [2020-10-13 23:31:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:10,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:15,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:31:15,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:31:15,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:15,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:31:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:31:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:31:15,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:15,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:15,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:15,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:15,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:15,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:15,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:15,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:15,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-13 23:31:15,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908614708] [2020-10-13 23:31:15,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:15,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:31:15,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687261305] [2020-10-13 23:31:15,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:31:15,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:15,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:31:15,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:15,428 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 10 states. [2020-10-13 23:31:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:15,565 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-10-13 23:31:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:31:15,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-13 23:31:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:15,567 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:31:15,567 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:31:15,568 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 23:31:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:31:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-10-13 23:31:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:31:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-13 23:31:15,574 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2020-10-13 23:31:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:15,574 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-13 23:31:15,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:31:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-13 23:31:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:31:15,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:15,576 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:15,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:31:15,576 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1905913412, now seen corresponding path program 10 times [2020-10-13 23:31:15,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:15,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094038278] [2020-10-13 23:31:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:17,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:20,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:31:20,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:20,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:31:20,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:20,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:20,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:20,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:20,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:20,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:20,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:20,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:20,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:20,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:20,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:20,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:20,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:20,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:20,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:20,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:20,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:31:20,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094038278] [2020-10-13 23:31:20,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:20,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:20,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890149774] [2020-10-13 23:31:20,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:20,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:20,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:20,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:20,658 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 8 states. [2020-10-13 23:31:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:20,750 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2020-10-13 23:31:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:20,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-13 23:31:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:20,752 INFO L225 Difference]: With dead ends: 136 [2020-10-13 23:31:20,752 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:31:20,754 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 23:31:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:31:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 23:31:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:31:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-13 23:31:20,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2020-10-13 23:31:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:20,760 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-13 23:31:20,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-13 23:31:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:31:20,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:20,762 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:20,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:31:20,762 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:20,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:20,763 INFO L82 PathProgramCache]: Analyzing trace with hash -831611302, now seen corresponding path program 11 times [2020-10-13 23:31:20,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:20,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688230277] [2020-10-13 23:31:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:22,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:25,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:31:25,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:25,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:31:25,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:25,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:25,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:31:25,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:31:25,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:31:25,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:25,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:25,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:25,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:25,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:25,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:25,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:25,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-13 23:31:25,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688230277] [2020-10-13 23:31:25,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:25,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:31:25,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060469611] [2020-10-13 23:31:25,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:31:25,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:25,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:31:25,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:25,874 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 11 states. [2020-10-13 23:31:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:26,078 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-10-13 23:31:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:31:26,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-13 23:31:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:26,080 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:31:26,081 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:31:26,082 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 23:31:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:31:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-13 23:31:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:31:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-13 23:31:26,095 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 71 [2020-10-13 23:31:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:26,099 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-13 23:31:26,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:31:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-13 23:31:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:31:26,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:26,103 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:26,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:31:26,104 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:26,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2094196148, now seen corresponding path program 12 times [2020-10-13 23:31:26,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:26,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743040453] [2020-10-13 23:31:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:26,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:31,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:31:31,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:31,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 23:31:31,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:31,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:31,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:31,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:31,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:31,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:31,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:31,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:31,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:31,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:31,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:31,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:31,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:31,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-13 23:31:31,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743040453] [2020-10-13 23:31:31,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:31,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:31,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655096693] [2020-10-13 23:31:31,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:31,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:31,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:31,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:31,275 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 9 states. [2020-10-13 23:31:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:31,372 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2020-10-13 23:31:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:31,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-13 23:31:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:31,373 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:31:31,373 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:31:31,374 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 23:31:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:31:31,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 23:31:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:31:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-13 23:31:31,387 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 77 [2020-10-13 23:31:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:31,387 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-13 23:31:31,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-13 23:31:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:31:31,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:31,389 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:31,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:31:31,389 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash 600568914, now seen corresponding path program 13 times [2020-10-13 23:31:31,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:31,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433615668] [2020-10-13 23:31:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:31,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:34,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:36,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:31:36,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:36,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 23:31:36,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:36,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:36,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:31:36,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:31:36,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:31:36,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:36,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:36,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:36,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:36,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:36,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:36,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:36,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:36,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:36,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:36,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:36,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-10-13 23:31:36,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433615668] [2020-10-13 23:31:36,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:36,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:31:36,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223860735] [2020-10-13 23:31:36,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:31:36,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:36,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:31:36,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:31:36,553 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 12 states. [2020-10-13 23:31:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:36,775 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-10-13 23:31:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:31:36,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-13 23:31:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:36,777 INFO L225 Difference]: With dead ends: 140 [2020-10-13 23:31:36,777 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:31:36,778 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 23:31:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:31:36,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-10-13 23:31:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:31:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-13 23:31:36,790 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 79 [2020-10-13 23:31:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:36,790 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-13 23:31:36,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:31:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-13 23:31:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 23:31:36,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:36,792 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:36,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:31:36,793 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash 420061612, now seen corresponding path program 14 times [2020-10-13 23:31:36,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:36,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884203122] [2020-10-13 23:31:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:36,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:41,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:31:41,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:31:41,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:31:41,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:41,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:31:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:31:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:31:41,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:41,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:41,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:41,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:41,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:41,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:41,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:41,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:41,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:41,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:41,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-13 23:31:41,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884203122] [2020-10-13 23:31:41,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:41,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:31:41,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330331669] [2020-10-13 23:31:41,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:31:41,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:31:41,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:31:41,946 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 13 states. [2020-10-13 23:31:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:42,153 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2020-10-13 23:31:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:31:42,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-10-13 23:31:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:42,154 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:31:42,154 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:31:42,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:31:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:31:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-10-13 23:31:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:31:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-13 23:31:42,164 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 85 [2020-10-13 23:31:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:42,165 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-13 23:31:42,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:31:42,165 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-13 23:31:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:31:42,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:42,166 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:42,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:31:42,166 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1904092038, now seen corresponding path program 15 times [2020-10-13 23:31:42,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:42,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993365847] [2020-10-13 23:31:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:42,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:47,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:31:47,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:31:47,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:31:47,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:47,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:31:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:31:47,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:47,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:47,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:47,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:47,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:47,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:47,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:47,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:47,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:47,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:47,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 23:31:47,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993365847] [2020-10-13 23:31:47,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:47,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:31:47,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939414017] [2020-10-13 23:31:47,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:31:47,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:47,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:31:47,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:47,258 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 10 states. [2020-10-13 23:31:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:47,339 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2020-10-13 23:31:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:31:47,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 91 [2020-10-13 23:31:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:47,341 INFO L225 Difference]: With dead ends: 176 [2020-10-13 23:31:47,341 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:31:47,342 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 23:31:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:31:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-13 23:31:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:31:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-13 23:31:47,346 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 91 [2020-10-13 23:31:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:47,346 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-13 23:31:47,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:31:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-13 23:31:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 23:31:47,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:47,348 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:47,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:31:47,348 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1710376356, now seen corresponding path program 16 times [2020-10-13 23:31:47,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:47,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553023766] [2020-10-13 23:31:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:47,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:52,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:31:52,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:31:52,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:31:52,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:52,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:31:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:31:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:31:52,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:52,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:52,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:52,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:52,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:52,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:52,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:52,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:52,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-10-13 23:31:52,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553023766] [2020-10-13 23:31:52,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:52,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:31:52,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287143405] [2020-10-13 23:31:52,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:31:52,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:52,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:31:52,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:31:52,512 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 14 states. [2020-10-13 23:31:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:52,742 INFO L93 Difference]: Finished difference Result 162 states and 171 transitions. [2020-10-13 23:31:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:31:52,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-10-13 23:31:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:52,743 INFO L225 Difference]: With dead ends: 162 [2020-10-13 23:31:52,743 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 23:31:52,744 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 23:31:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 23:31:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-10-13 23:31:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 23:31:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-13 23:31:52,750 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 93 [2020-10-13 23:31:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:52,750 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-13 23:31:52,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:31:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-13 23:31:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:31:52,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:52,752 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:52,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:31:52,752 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1187140226, now seen corresponding path program 17 times [2020-10-13 23:31:52,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:52,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398362252] [2020-10-13 23:31:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:52,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:57,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 23:31:57,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:31:57,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:31:57,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:57,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:31:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:31:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:57,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:57,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:57,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:57,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:57,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:57,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:57,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:57,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:57,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:57,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:57,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-13 23:31:57,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398362252] [2020-10-13 23:31:57,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:57,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:31:57,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064217606] [2020-10-13 23:31:57,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:31:57,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:31:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:57,875 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 11 states. [2020-10-13 23:31:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:57,987 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2020-10-13 23:31:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:31:57,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2020-10-13 23:31:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:57,989 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:31:57,989 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 23:31:57,991 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 23:31:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 23:31:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 23:31:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:31:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-13 23:31:57,996 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2020-10-13 23:31:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:57,996 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-13 23:31:57,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:31:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-13 23:31:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:31:57,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:57,997 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:57,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:31:57,997 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:57,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1886704028, now seen corresponding path program 18 times [2020-10-13 23:31:57,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:57,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267220699] [2020-10-13 23:31:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:58,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:03,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:32:03,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:03,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:32:03,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:03,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:03,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:32:03,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:32:03,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:32:03,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:03,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:03,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:03,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:03,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:03,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:03,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:03,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:03,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:03,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:03,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:03,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-13 23:32:03,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267220699] [2020-10-13 23:32:03,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:03,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:32:03,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898502824] [2020-10-13 23:32:03,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:32:03,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:32:03,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:03,160 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 15 states. [2020-10-13 23:32:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:03,390 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2020-10-13 23:32:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:32:03,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 101 [2020-10-13 23:32:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:03,392 INFO L225 Difference]: With dead ends: 174 [2020-10-13 23:32:03,392 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:32:03,393 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 23:32:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:32:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-13 23:32:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:32:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-13 23:32:03,397 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 101 [2020-10-13 23:32:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:03,398 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-13 23:32:03,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:32:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-13 23:32:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:32:03,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:03,399 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:03,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:32:03,400 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1079959690, now seen corresponding path program 19 times [2020-10-13 23:32:03,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:03,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531793296] [2020-10-13 23:32:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:03,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:08,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:32:08,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:08,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:32:08,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:08,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:32:08,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:32:08,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:32:08,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:08,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:08,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:08,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:08,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:08,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:08,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:08,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:08,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:08,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:08,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:08,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-10-13 23:32:08,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531793296] [2020-10-13 23:32:08,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:08,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:32:08,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881987309] [2020-10-13 23:32:08,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:32:08,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:32:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:08,568 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 16 states. [2020-10-13 23:32:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:08,786 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2020-10-13 23:32:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:32:08,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2020-10-13 23:32:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:08,787 INFO L225 Difference]: With dead ends: 184 [2020-10-13 23:32:08,787 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:32:08,788 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 23:32:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:32:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-10-13 23:32:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:32:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-13 23:32:08,801 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 107 [2020-10-13 23:32:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:08,802 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-13 23:32:08,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:32:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-13 23:32:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 23:32:08,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:08,806 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:08,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:32:08,807 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:08,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:08,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1242439216, now seen corresponding path program 20 times [2020-10-13 23:32:08,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:08,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525601937] [2020-10-13 23:32:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:08,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:13,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 23:32:13,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:13,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-13 23:32:13,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:13,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:13,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:13,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:13,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:13,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:13,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:13,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:13,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:13,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:13,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:13,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:13,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:13,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:32:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-13 23:32:13,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525601937] [2020-10-13 23:32:13,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:13,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:13,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504851901] [2020-10-13 23:32:13,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:13,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:13,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:13,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:13,986 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 12 states. [2020-10-13 23:32:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:14,114 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2020-10-13 23:32:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:14,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-10-13 23:32:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:14,116 INFO L225 Difference]: With dead ends: 216 [2020-10-13 23:32:14,116 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:32:14,117 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 23:32:14,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:32:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 23:32:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 23:32:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-13 23:32:14,123 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2020-10-13 23:32:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:14,123 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-13 23:32:14,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:14,123 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-13 23:32:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:32:14,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:14,125 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:14,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:32:14,125 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:14,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1670412654, now seen corresponding path program 21 times [2020-10-13 23:32:14,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:14,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536284989] [2020-10-13 23:32:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:14,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:19,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 23:32:19,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:19,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 23:32:19,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:19,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:19,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:32:19,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:32:19,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:32:19,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:19,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:19,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:19,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:19,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:19,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:19,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:19,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:19,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:19,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:19,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-10-13 23:32:19,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536284989] [2020-10-13 23:32:19,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:19,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:32:19,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465665726] [2020-10-13 23:32:19,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:32:19,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:32:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:19,357 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 17 states. [2020-10-13 23:32:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:19,628 INFO L93 Difference]: Finished difference Result 196 states and 205 transitions. [2020-10-13 23:32:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:32:19,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 115 [2020-10-13 23:32:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:19,629 INFO L225 Difference]: With dead ends: 196 [2020-10-13 23:32:19,630 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:32:19,630 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 23:32:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:32:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-10-13 23:32:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 23:32:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-13 23:32:19,638 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 115 [2020-10-13 23:32:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:19,639 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-13 23:32:19,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:32:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-13 23:32:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 23:32:19,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:19,640 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:19,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:32:19,643 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2124390856, now seen corresponding path program 22 times [2020-10-13 23:32:19,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:19,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136233665] [2020-10-13 23:32:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:19,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:24,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:24,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:24,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:24,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:24,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:24,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:24,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:24,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-13 23:32:24,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136233665] [2020-10-13 23:32:24,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:24,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:24,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006925414] [2020-10-13 23:32:24,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:24,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:24,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:24,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:24,785 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 13 states. [2020-10-13 23:32:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:24,894 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2020-10-13 23:32:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:24,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-10-13 23:32:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:24,896 INFO L225 Difference]: With dead ends: 230 [2020-10-13 23:32:24,896 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:32:24,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:32:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 23:32:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:32:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-10-13 23:32:24,907 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2020-10-13 23:32:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:24,908 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-10-13 23:32:24,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-10-13 23:32:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 23:32:24,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:24,909 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:24,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:32:24,909 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1913406618, now seen corresponding path program 23 times [2020-10-13 23:32:24,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:24,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710591191] [2020-10-13 23:32:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:24,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:30,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 23:32:30,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:30,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-13 23:32:30,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:30,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:30,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:32:30,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:32:30,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:32:30,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:30,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:30,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:30,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:30,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:30,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:32:30,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:30,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:30,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2020-10-13 23:32:30,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710591191] [2020-10-13 23:32:30,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:30,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:32:30,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724837708] [2020-10-13 23:32:30,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:32:30,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:30,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:32:30,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:32:30,242 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 18 states. [2020-10-13 23:32:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:30,496 INFO L93 Difference]: Finished difference Result 208 states and 217 transitions. [2020-10-13 23:32:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:32:30,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 123 [2020-10-13 23:32:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:30,502 INFO L225 Difference]: With dead ends: 208 [2020-10-13 23:32:30,502 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 23:32:30,503 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 23:32:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 23:32:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-10-13 23:32:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 23:32:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-13 23:32:30,509 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 123 [2020-10-13 23:32:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:30,509 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-13 23:32:30,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:32:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-13 23:32:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 23:32:30,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:30,511 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:30,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:32:30,512 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2058663488, now seen corresponding path program 24 times [2020-10-13 23:32:30,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:30,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321995905] [2020-10-13 23:32:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:30,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:35,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 23:32:35,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 23:32:35,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:35,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:35,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:35,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:35,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:35,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:35,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:35,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:35,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:35,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:35,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:35,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:35,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:35,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-13 23:32:35,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321995905] [2020-10-13 23:32:35,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:35,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:35,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789477707] [2020-10-13 23:32:35,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:35,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:35,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:35,676 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 14 states. [2020-10-13 23:32:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:35,799 INFO L93 Difference]: Finished difference Result 244 states and 252 transitions. [2020-10-13 23:32:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:35,800 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 129 [2020-10-13 23:32:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:35,801 INFO L225 Difference]: With dead ends: 244 [2020-10-13 23:32:35,801 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 23:32:35,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 23:32:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-13 23:32:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:32:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-10-13 23:32:35,809 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2020-10-13 23:32:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:35,809 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-10-13 23:32:35,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-10-13 23:32:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:32:35,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:35,811 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:35,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:32:35,811 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash 833807710, now seen corresponding path program 25 times [2020-10-13 23:32:35,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:35,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489454906] [2020-10-13 23:32:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:40,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:40,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:32:40,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:40,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 23:32:40,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:40,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:40,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:32:40,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:32:40,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:32:40,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:41,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:41,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:41,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:41,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:41,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:41,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:41,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:41,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:41,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2020-10-13 23:32:41,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489454906] [2020-10-13 23:32:41,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:41,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:32:41,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138417309] [2020-10-13 23:32:41,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:32:41,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:41,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:32:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:32:41,095 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 19 states. [2020-10-13 23:32:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:41,345 INFO L93 Difference]: Finished difference Result 220 states and 229 transitions. [2020-10-13 23:32:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:32:41,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 131 [2020-10-13 23:32:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:41,347 INFO L225 Difference]: With dead ends: 220 [2020-10-13 23:32:41,347 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:32:41,348 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 23:32:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:32:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-13 23:32:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:32:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-13 23:32:41,354 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 131 [2020-10-13 23:32:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:41,354 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-13 23:32:41,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:32:41,355 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-13 23:32:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:32:41,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:41,356 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:41,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:32:41,356 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash 81582520, now seen corresponding path program 26 times [2020-10-13 23:32:41,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:41,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509049576] [2020-10-13 23:32:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:41,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:46,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:46,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:32:46,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:46,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:32:46,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:46,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:32:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:32:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:32:46,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:46,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:46,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:46,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:46,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:46,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:46,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:46,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:46,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:46,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:46,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:46,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:46,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2020-10-13 23:32:46,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509049576] [2020-10-13 23:32:46,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:46,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:32:46,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348239856] [2020-10-13 23:32:46,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:32:46,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:46,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:32:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:32:46,635 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 20 states. [2020-10-13 23:32:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:46,949 INFO L93 Difference]: Finished difference Result 230 states and 239 transitions. [2020-10-13 23:32:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:32:46,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2020-10-13 23:32:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:46,951 INFO L225 Difference]: With dead ends: 230 [2020-10-13 23:32:46,952 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:32:46,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:32:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:32:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-10-13 23:32:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 23:32:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2020-10-13 23:32:46,959 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 137 [2020-10-13 23:32:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:46,959 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2020-10-13 23:32:46,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:32:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2020-10-13 23:32:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 23:32:46,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:46,961 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:46,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:32:46,961 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:46,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2024512878, now seen corresponding path program 27 times [2020-10-13 23:32:46,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:46,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007311364] [2020-10-13 23:32:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:46,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:52,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 23:32:52,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:52,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-13 23:32:52,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:52,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:32:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:32:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:52,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:52,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:52,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:52,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:52,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:32:52,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:52,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:52,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-10-13 23:32:52,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007311364] [2020-10-13 23:32:52,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:52,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:32:52,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526761263] [2020-10-13 23:32:52,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:32:52,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:32:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:52,175 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 15 states. [2020-10-13 23:32:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:52,314 INFO L93 Difference]: Finished difference Result 270 states and 278 transitions. [2020-10-13 23:32:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:32:52,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 143 [2020-10-13 23:32:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:52,316 INFO L225 Difference]: With dead ends: 270 [2020-10-13 23:32:52,316 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:32:52,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:32:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-13 23:32:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 23:32:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-10-13 23:32:52,323 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 143 [2020-10-13 23:32:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:52,323 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-10-13 23:32:52,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:32:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-10-13 23:32:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 23:32:52,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:52,324 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:52,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:32:52,325 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1111249328, now seen corresponding path program 28 times [2020-10-13 23:32:52,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:52,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150954935] [2020-10-13 23:32:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:57,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:57,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 23:32:57,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:32:57,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5166 [2020-10-13 23:32:57,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:57,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:57,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:32:57,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 23:32:57,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:32:57,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:57,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:57,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:57,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:57,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:57,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:57,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:57,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:57,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:57,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-13 23:32:57,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150954935] [2020-10-13 23:32:57,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:57,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:32:57,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624759437] [2020-10-13 23:32:57,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:32:57,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:32:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:32:57,792 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 21 states. [2020-10-13 23:32:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:58,105 INFO L93 Difference]: Finished difference Result 242 states and 251 transitions. [2020-10-13 23:32:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:32:58,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 145 [2020-10-13 23:32:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:58,107 INFO L225 Difference]: With dead ends: 242 [2020-10-13 23:32:58,107 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:32:58,108 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 23:32:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:32:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2020-10-13 23:32:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:32:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2020-10-13 23:32:58,114 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 145 [2020-10-13 23:32:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:58,114 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2020-10-13 23:32:58,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:32:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2020-10-13 23:32:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:32:58,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:58,115 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:58,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:32:58,116 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1690550410, now seen corresponding path program 29 times [2020-10-13 23:32:58,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:58,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371052412] [2020-10-13 23:32:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:58,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:03,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 23:33:03,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:03,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-13 23:33:03,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:03,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:03,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:33:03,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:03,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:33:03,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:03,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:03,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:03,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:03,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:03,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:03,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:03,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:03,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:03,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:03,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:03,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2020-10-13 23:33:03,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371052412] [2020-10-13 23:33:03,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:03,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:33:03,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294600846] [2020-10-13 23:33:03,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:33:03,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:03,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:33:03,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:03,413 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 16 states. [2020-10-13 23:33:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:03,516 INFO L93 Difference]: Finished difference Result 284 states and 292 transitions. [2020-10-13 23:33:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:33:03,517 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 151 [2020-10-13 23:33:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:03,518 INFO L225 Difference]: With dead ends: 284 [2020-10-13 23:33:03,518 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:33:03,519 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 23:33:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:33:03,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-13 23:33:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 23:33:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2020-10-13 23:33:03,528 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 151 [2020-10-13 23:33:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:03,529 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2020-10-13 23:33:03,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:33:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2020-10-13 23:33:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 23:33:03,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:03,530 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:03,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:33:03,530 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:03,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1940803160, now seen corresponding path program 30 times [2020-10-13 23:33:03,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:03,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607053850] [2020-10-13 23:33:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:03,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:08,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:08,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 23:33:08,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:08,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-13 23:33:08,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:08,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:33:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:33:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:33:08,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:08,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:08,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:08,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:08,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:08,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:08,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:08,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:08,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:08,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:08,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:08,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2020-10-13 23:33:08,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607053850] [2020-10-13 23:33:08,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:08,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:33:08,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835455553] [2020-10-13 23:33:08,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:33:08,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:33:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:08,911 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 22 states. [2020-10-13 23:33:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:09,229 INFO L93 Difference]: Finished difference Result 254 states and 263 transitions. [2020-10-13 23:33:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:33:09,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 153 [2020-10-13 23:33:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:09,231 INFO L225 Difference]: With dead ends: 254 [2020-10-13 23:33:09,231 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 23:33:09,232 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 23:33:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 23:33:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2020-10-13 23:33:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 23:33:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-13 23:33:09,241 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 153 [2020-10-13 23:33:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:09,241 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-13 23:33:09,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:33:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-13 23:33:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 23:33:09,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:09,243 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:09,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:33:09,243 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 619906690, now seen corresponding path program 31 times [2020-10-13 23:33:09,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:09,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843581631] [2020-10-13 23:33:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:09,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:14,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:14,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 23:33:14,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:14,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:33:14,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:14,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:14,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:33:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:33:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:33:14,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:14,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:14,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:14,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:14,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:14,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:14,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:14,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:14,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:14,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:14,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:14,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:14,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2020-10-13 23:33:14,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843581631] [2020-10-13 23:33:14,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:14,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:33:14,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177378943] [2020-10-13 23:33:14,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:33:14,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:14,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:33:14,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:14,567 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 23 states. [2020-10-13 23:33:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:14,938 INFO L93 Difference]: Finished difference Result 264 states and 273 transitions. [2020-10-13 23:33:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:33:14,939 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 159 [2020-10-13 23:33:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:14,940 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:33:14,940 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 23:33:14,941 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 23:33:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 23:33:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-10-13 23:33:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 23:33:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-10-13 23:33:14,947 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 159 [2020-10-13 23:33:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:14,948 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-10-13 23:33:14,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:33:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-10-13 23:33:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 23:33:14,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:14,949 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:14,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:33:14,949 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1698664412, now seen corresponding path program 32 times [2020-10-13 23:33:14,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:14,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293987304] [2020-10-13 23:33:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:14,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:20,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 23:33:20,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:20,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-13 23:33:20,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:20,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:33:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:33:20,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:20,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:20,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:20,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:20,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:20,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:20,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:20,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:20,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-13 23:33:20,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293987304] [2020-10-13 23:33:20,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:20,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:33:20,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097542049] [2020-10-13 23:33:20,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:33:20,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:33:20,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:20,194 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 17 states. [2020-10-13 23:33:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:20,331 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2020-10-13 23:33:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:33:20,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 165 [2020-10-13 23:33:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:20,333 INFO L225 Difference]: With dead ends: 310 [2020-10-13 23:33:20,334 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 23:33:20,334 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 23:33:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 23:33:20,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-10-13 23:33:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 23:33:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2020-10-13 23:33:20,341 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 165 [2020-10-13 23:33:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:20,342 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2020-10-13 23:33:20,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:33:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2020-10-13 23:33:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:33:20,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:20,343 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:20,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:33:20,344 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash -389401478, now seen corresponding path program 33 times [2020-10-13 23:33:20,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:20,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969353511] [2020-10-13 23:33:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:25,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 23:33:25,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-13 23:33:25,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:25,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:33:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 23:33:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:33:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:25,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:25,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:25,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:25,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:33:25,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:25,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:25,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:25,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:25,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:25,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2020-10-13 23:33:25,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969353511] [2020-10-13 23:33:25,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:25,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:33:25,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169224937] [2020-10-13 23:33:25,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:33:25,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:25,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:33:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:33:25,893 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 24 states. [2020-10-13 23:33:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:26,379 INFO L93 Difference]: Finished difference Result 276 states and 285 transitions. [2020-10-13 23:33:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:33:26,379 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 167 [2020-10-13 23:33:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:26,381 INFO L225 Difference]: With dead ends: 276 [2020-10-13 23:33:26,381 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 23:33:26,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:33:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 23:33:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-13 23:33:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:33:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-10-13 23:33:26,389 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 167 [2020-10-13 23:33:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:26,390 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-10-13 23:33:26,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:33:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-10-13 23:33:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 23:33:26,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:26,391 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:26,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:33:26,391 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:26,392 INFO L82 PathProgramCache]: Analyzing trace with hash 676209620, now seen corresponding path program 34 times [2020-10-13 23:33:26,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:26,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659480576] [2020-10-13 23:33:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:26,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:26,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:31,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 23:33:31,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:31,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:33:31,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:31,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:31,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:33:31,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:31,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:33:31,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:31,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:31,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:31,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:31,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:33:31,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:31,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2020-10-13 23:33:31,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659480576] [2020-10-13 23:33:31,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:31,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:33:31,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373908024] [2020-10-13 23:33:31,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:33:31,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:31,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:33:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:33:31,617 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 18 states. [2020-10-13 23:33:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:31,786 INFO L93 Difference]: Finished difference Result 324 states and 332 transitions. [2020-10-13 23:33:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:33:31,786 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-10-13 23:33:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:31,788 INFO L225 Difference]: With dead ends: 324 [2020-10-13 23:33:31,788 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 23:33:31,789 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 23:33:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 23:33:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2020-10-13 23:33:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 23:33:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2020-10-13 23:33:31,799 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 173 [2020-10-13 23:33:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:31,799 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2020-10-13 23:33:31,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:33:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2020-10-13 23:33:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-13 23:33:31,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:31,802 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:31,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:33:31,802 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:31,803 INFO L82 PathProgramCache]: Analyzing trace with hash -617526670, now seen corresponding path program 35 times [2020-10-13 23:33:31,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:31,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171485964] [2020-10-13 23:33:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:33:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:37,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:37,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:37,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:37,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:37,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:37,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:37,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:37,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-13 23:33:37,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171485964] [2020-10-13 23:33:37,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:37,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:33:37,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660180077] [2020-10-13 23:33:37,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:33:37,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:33:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:33:37,266 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 25 states. [2020-10-13 23:33:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:37,690 INFO L93 Difference]: Finished difference Result 288 states and 297 transitions. [2020-10-13 23:33:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:33:37,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 175 [2020-10-13 23:33:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:37,693 INFO L225 Difference]: With dead ends: 288 [2020-10-13 23:33:37,693 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 23:33:37,694 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 23:33:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 23:33:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-10-13 23:33:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 23:33:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-10-13 23:33:37,701 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 175 [2020-10-13 23:33:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:37,702 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-10-13 23:33:37,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:33:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-10-13 23:33:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 23:33:37,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:37,703 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:37,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:33:37,704 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:37,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1719050188, now seen corresponding path program 36 times [2020-10-13 23:33:37,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:37,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725731296] [2020-10-13 23:33:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:42,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:42,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 23:33:42,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:42,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5245 [2020-10-13 23:33:42,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:42,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:42,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:33:42,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:42,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:33:42,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:43,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:43,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:43,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:43,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:43,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:43,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:43,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:43,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:43,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:43,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-13 23:33:43,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725731296] [2020-10-13 23:33:43,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:43,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:33:43,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276949751] [2020-10-13 23:33:43,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:33:43,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:43,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:33:43,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:43,191 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 19 states. [2020-10-13 23:33:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:43,345 INFO L93 Difference]: Finished difference Result 338 states and 346 transitions. [2020-10-13 23:33:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:33:43,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 181 [2020-10-13 23:33:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:43,346 INFO L225 Difference]: With dead ends: 338 [2020-10-13 23:33:43,347 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 23:33:43,347 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 23:33:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 23:33:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-10-13 23:33:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 23:33:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2020-10-13 23:33:43,354 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 181 [2020-10-13 23:33:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:43,355 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2020-10-13 23:33:43,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:33:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2020-10-13 23:33:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-13 23:33:43,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:43,356 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:43,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:33:43,357 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:43,357 INFO L82 PathProgramCache]: Analyzing trace with hash 823150698, now seen corresponding path program 37 times [2020-10-13 23:33:43,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:43,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118730048] [2020-10-13 23:33:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:43,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:48,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-13 23:33:48,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:48,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:33:48,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:48,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:33:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 23:33:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:33:48,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:48,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:48,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:48,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:48,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:48,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:48,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:48,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:48,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:48,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:48,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:48,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2020-10-13 23:33:48,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118730048] [2020-10-13 23:33:48,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:48,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:33:48,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190958843] [2020-10-13 23:33:48,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:33:48,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:33:48,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:33:48,803 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 26 states. [2020-10-13 23:33:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:49,222 INFO L93 Difference]: Finished difference Result 300 states and 309 transitions. [2020-10-13 23:33:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:33:49,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 183 [2020-10-13 23:33:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:49,224 INFO L225 Difference]: With dead ends: 300 [2020-10-13 23:33:49,224 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 23:33:49,225 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 23:33:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 23:33:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-10-13 23:33:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 23:33:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-10-13 23:33:49,231 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 183 [2020-10-13 23:33:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:49,232 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-10-13 23:33:49,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:33:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-10-13 23:33:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-13 23:33:49,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:49,234 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:49,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:33:49,234 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:49,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1667169340, now seen corresponding path program 38 times [2020-10-13 23:33:49,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:49,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816092943] [2020-10-13 23:33:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:49,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:54,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:54,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-13 23:33:54,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:54,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-13 23:33:54,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:54,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:54,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:33:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:33:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:33:54,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:54,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:54,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:54,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:54,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:54,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:54,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:54,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:54,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:54,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1843 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2020-10-13 23:33:54,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816092943] [2020-10-13 23:33:54,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:54,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:33:54,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012906433] [2020-10-13 23:33:54,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:33:54,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:54,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:33:54,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:33:54,768 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 27 states. [2020-10-13 23:33:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:55,205 INFO L93 Difference]: Finished difference Result 310 states and 319 transitions. [2020-10-13 23:33:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:33:55,205 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 189 [2020-10-13 23:33:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:55,207 INFO L225 Difference]: With dead ends: 310 [2020-10-13 23:33:55,207 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 23:33:55,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:33:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 23:33:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2020-10-13 23:33:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 23:33:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2020-10-13 23:33:55,214 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 189 [2020-10-13 23:33:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:55,215 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2020-10-13 23:33:55,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:33:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2020-10-13 23:33:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 23:33:55,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:55,216 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:55,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:33:55,217 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 330699678, now seen corresponding path program 39 times [2020-10-13 23:33:55,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:55,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172763544] [2020-10-13 23:33:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:55,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 23:34:00,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:00,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:34:00,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:34:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:34:00,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:00,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:00,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:00,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:00,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:00,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:00,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2020-10-13 23:34:00,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172763544] [2020-10-13 23:34:00,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:00,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:34:00,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688952530] [2020-10-13 23:34:00,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:34:00,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:00,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:34:00,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:34:00,494 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 20 states. [2020-10-13 23:34:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:00,618 INFO L93 Difference]: Finished difference Result 364 states and 372 transitions. [2020-10-13 23:34:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:34:00,618 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-10-13 23:34:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:00,620 INFO L225 Difference]: With dead ends: 364 [2020-10-13 23:34:00,620 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 23:34:00,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:34:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 23:34:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-10-13 23:34:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:34:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2020-10-13 23:34:00,627 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 195 [2020-10-13 23:34:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:00,628 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2020-10-13 23:34:00,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:34:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2020-10-13 23:34:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:34:00,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:00,629 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:00,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:34:00,630 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:00,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1370836924, now seen corresponding path program 40 times [2020-10-13 23:34:00,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:00,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105273475] [2020-10-13 23:34:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:00,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:34:06,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:06,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5409 [2020-10-13 23:34:06,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:34:06,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-13 23:34:06,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:34:06,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:06,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:06,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:06,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:06,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:06,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2020-10-13 23:34:06,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105273475] [2020-10-13 23:34:06,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:06,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:34:06,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755086418] [2020-10-13 23:34:06,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:34:06,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:06,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:34:06,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:34:06,480 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand 28 states. [2020-10-13 23:34:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:06,931 INFO L93 Difference]: Finished difference Result 322 states and 331 transitions. [2020-10-13 23:34:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:34:06,932 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 197 [2020-10-13 23:34:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:06,934 INFO L225 Difference]: With dead ends: 322 [2020-10-13 23:34:06,934 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 23:34:06,935 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 23:34:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 23:34:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-13 23:34:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 23:34:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2020-10-13 23:34:06,941 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 197 [2020-10-13 23:34:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:06,942 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2020-10-13 23:34:06,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:34:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2020-10-13 23:34:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-13 23:34:06,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:06,943 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:06,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:34:06,944 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:06,944 INFO L82 PathProgramCache]: Analyzing trace with hash -577550954, now seen corresponding path program 41 times [2020-10-13 23:34:06,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:06,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170423446] [2020-10-13 23:34:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:06,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-13 23:34:12,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:12,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5178 [2020-10-13 23:34:12,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:34:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:34:12,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:12,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:12,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:12,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:12,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:12,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:12,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:12,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:12,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2164 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2020-10-13 23:34:12,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170423446] [2020-10-13 23:34:12,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:12,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:34:12,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863347293] [2020-10-13 23:34:12,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:34:12,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:34:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:34:12,382 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand 21 states. [2020-10-13 23:34:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:12,551 INFO L93 Difference]: Finished difference Result 378 states and 386 transitions. [2020-10-13 23:34:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:34:12,551 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 203 [2020-10-13 23:34:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:12,553 INFO L225 Difference]: With dead ends: 378 [2020-10-13 23:34:12,553 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 23:34:12,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:34:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 23:34:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2020-10-13 23:34:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-13 23:34:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2020-10-13 23:34:12,560 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 203 [2020-10-13 23:34:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:12,560 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2020-10-13 23:34:12,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:34:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2020-10-13 23:34:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-13 23:34:12,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:12,562 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:12,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:34:12,562 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash 379290548, now seen corresponding path program 42 times [2020-10-13 23:34:12,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:12,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79838605] [2020-10-13 23:34:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:12,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:17,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:17,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-13 23:34:17,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 23:34:17,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:17,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:34:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 23:34:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:34:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:18,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:18,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:18,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:18,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:18,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:18,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:18,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:18,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:18,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2199 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2020-10-13 23:34:18,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79838605] [2020-10-13 23:34:18,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:18,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:34:18,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035256963] [2020-10-13 23:34:18,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:34:18,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:34:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:34:18,091 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand 29 states. [2020-10-13 23:34:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:18,553 INFO L93 Difference]: Finished difference Result 334 states and 343 transitions. [2020-10-13 23:34:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:34:18,554 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 205 [2020-10-13 23:34:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:18,555 INFO L225 Difference]: With dead ends: 334 [2020-10-13 23:34:18,556 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 23:34:18,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:34:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 23:34:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-10-13 23:34:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 23:34:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2020-10-13 23:34:18,564 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 205 [2020-10-13 23:34:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:18,564 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2020-10-13 23:34:18,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:34:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2020-10-13 23:34:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 23:34:18,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:18,566 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:18,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:34:18,567 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:18,567 INFO L82 PathProgramCache]: Analyzing trace with hash -498311282, now seen corresponding path program 43 times [2020-10-13 23:34:18,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:18,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387198188] [2020-10-13 23:34:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:18,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:18,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:18,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:23,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:23,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 23:34:23,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:23,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-13 23:34:23,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:23,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:34:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:34:23,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:34:23,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:24,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:24,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:24,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:24,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:24,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:24,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:24,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:24,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:24,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:24,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:24,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1676 trivial. 0 not checked. [2020-10-13 23:34:24,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387198188] [2020-10-13 23:34:24,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:24,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:34:24,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111090044] [2020-10-13 23:34:24,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:34:24,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:34:24,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:34:24,195 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand 30 states. [2020-10-13 23:34:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:24,567 INFO L93 Difference]: Finished difference Result 344 states and 353 transitions. [2020-10-13 23:34:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:34:24,567 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 211 [2020-10-13 23:34:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:24,569 INFO L225 Difference]: With dead ends: 344 [2020-10-13 23:34:24,569 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 23:34:24,570 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 23:34:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 23:34:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-13 23:34:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 23:34:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2020-10-13 23:34:24,577 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 211 [2020-10-13 23:34:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:24,577 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2020-10-13 23:34:24,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:34:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2020-10-13 23:34:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 23:34:24,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:24,579 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:24,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:34:24,579 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:24,580 INFO L82 PathProgramCache]: Analyzing trace with hash 240070632, now seen corresponding path program 44 times [2020-10-13 23:34:24,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:24,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837325123] [2020-10-13 23:34:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:24,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:29,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:29,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-13 23:34:29,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5279 [2020-10-13 23:34:29,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:29,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:34:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:34:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:30,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:30,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:30,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:30,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:30,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:30,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:30,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:30,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:30,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:30,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:30,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:30,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2020-10-13 23:34:30,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837325123] [2020-10-13 23:34:30,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:30,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:34:30,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914149000] [2020-10-13 23:34:30,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:34:30,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:30,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:34:30,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:34:30,156 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand 22 states. [2020-10-13 23:34:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:30,293 INFO L93 Difference]: Finished difference Result 404 states and 412 transitions. [2020-10-13 23:34:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:34:30,293 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 217 [2020-10-13 23:34:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:30,295 INFO L225 Difference]: With dead ends: 404 [2020-10-13 23:34:30,295 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 23:34:30,296 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 23:34:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 23:34:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2020-10-13 23:34:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 23:34:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2020-10-13 23:34:30,302 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 217 [2020-10-13 23:34:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:30,302 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2020-10-13 23:34:30,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:34:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2020-10-13 23:34:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 23:34:30,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:30,304 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:30,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:34:30,305 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2067177082, now seen corresponding path program 45 times [2020-10-13 23:34:30,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:30,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314213026] [2020-10-13 23:34:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:30,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:30,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking...