/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 SingleStatement --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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:40:10,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:40:10,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:40:10,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:40:10,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:40:10,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:40:10,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:40:10,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:40:10,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:40:10,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:40:10,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:40:10,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:40:10,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:40:10,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:40:10,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:40:10,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:40:10,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:40:10,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:40:10,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:40:10,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:40:10,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:40:10,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:40:10,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:40:10,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:40:10,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:40:10,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:40:10,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:40:10,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:40:10,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:40:10,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:40:10,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:40:10,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:40:10,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:40:10,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:40:10,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:40:10,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:40:10,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:40:10,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:40:10,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:40:10,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:40:10,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:40:10,261 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 [2020-09-25 13:40:10,289 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:40:10,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:40:10,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:40:10,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:40:10,291 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:40:10,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:40:10,291 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:40:10,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:40:10,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:40:10,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:40:10,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:40:10,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:40:10,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:40:10,293 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:40:10,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:40:10,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:40:10,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:40:10,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:40:10,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:40:10,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:40:10,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:40:10,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:40:10,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:40:10,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:40:10,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:40:10,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:40:10,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:40:10,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:40:10,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:40:10,296 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 -> SingleStatement 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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:40:10,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:40:10,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:40:10,820 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:40:10,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:40:10,823 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:40:10,824 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 13:40:10,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/456eff42f/072813d449764673bbc27cbeea8713c1/FLAG65dd02ac4 [2020-09-25 13:40:11,405 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:40:11,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 13:40:11,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/456eff42f/072813d449764673bbc27cbeea8713c1/FLAG65dd02ac4 [2020-09-25 13:40:11,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/456eff42f/072813d449764673bbc27cbeea8713c1 [2020-09-25 13:40:11,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:40:11,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:40:11,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:40:11,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:40:11,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:40:11,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:40:11" (1/1) ... [2020-09-25 13:40:11,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5273b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:11, skipping insertion in model container [2020-09-25 13:40:11,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:40:11" (1/1) ... [2020-09-25 13:40:11,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:40:11,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:40:12,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:40:12,047 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:40:12,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:40:12,090 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:40:12,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12 WrapperNode [2020-09-25 13:40:12,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:40:12,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:40:12,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:40:12,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:40:12,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (1/1) ... [2020-09-25 13:40:12,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (1/1) ... [2020-09-25 13:40:12,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (1/1) ... [2020-09-25 13:40:12,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (1/1) ... [2020-09-25 13:40:12,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (1/1) ... [2020-09-25 13:40:12,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (1/1) ... [2020-09-25 13:40:12,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (1/1) ... [2020-09-25 13:40:12,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:40:12,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:40:12,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:40:12,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:40:12,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (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 [2020-09-25 13:40:12,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:40:12,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:40:12,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 13:40:12,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 13:40:12,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:40:12,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:40:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:40:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 13:40:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 13:40:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:40:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:40:12,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:40:12,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:40:12,623 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:40:12,623 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 13:40:12,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:40:12 BoogieIcfgContainer [2020-09-25 13:40:12,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:40:12,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:40:12,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:40:12,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:40:12,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:40:11" (1/3) ... [2020-09-25 13:40:12,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43136555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:40:12, skipping insertion in model container [2020-09-25 13:40:12,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:40:12" (2/3) ... [2020-09-25 13:40:12,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43136555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:40:12, skipping insertion in model container [2020-09-25 13:40:12,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:40:12" (3/3) ... [2020-09-25 13:40:12,645 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-09-25 13:40:12,662 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:40:12,674 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:40:12,699 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:40:12,733 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:40:12,734 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:40:12,734 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:40:12,734 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:40:12,735 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:40:12,735 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:40:12,735 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:40:12,735 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:40:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-25 13:40:12,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 13:40:12,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:12,772 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] [2020-09-25 13:40:12,773 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash 288343897, now seen corresponding path program 1 times [2020-09-25 13:40:12,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:12,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588604232] [2020-09-25 13:40:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:12,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:13,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:13,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 13:40:13,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:13,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-25 13:40:13,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:13,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 13:40:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:13,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 13:40:13,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:13,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:13,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:13,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:13,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 13:40:13,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:13,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:13,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:13,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:13,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588604232] [2020-09-25 13:40:13,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:40:13,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 13:40:13,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229080787] [2020-09-25 13:40:13,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 13:40:13,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:13,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 13:40:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 13:40:13,108 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-09-25 13:40:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:13,144 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-09-25 13:40:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 13:40:13,146 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-09-25 13:40:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:13,160 INFO L225 Difference]: With dead ends: 75 [2020-09-25 13:40:13,161 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 13:40:13,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 13:40:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 13:40:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-25 13:40:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 13:40:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-25 13:40:13,223 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2020-09-25 13:40:13,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:13,224 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-25 13:40:13,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 13:40:13,224 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-25 13:40:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 13:40:13,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:13,226 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] [2020-09-25 13:40:13,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:40:13,227 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash 320540924, now seen corresponding path program 1 times [2020-09-25 13:40:13,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:13,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309588553] [2020-09-25 13:40:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:13,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:13,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:13,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 13:40:13,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:13,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-09-25 13:40:13,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:13,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:40:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 13:40:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 13:40:13,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:13,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:13,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:13,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:13,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:13,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:13,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:40:13,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:13,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:13,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:13,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:13,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:13,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:13,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309588553] [2020-09-25 13:40:13,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:40:13,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:40:13,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258012810] [2020-09-25 13:40:13,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:40:13,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:13,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:40:13,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:40:13,554 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2020-09-25 13:40:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:13,648 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-09-25 13:40:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:40:13,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 13:40:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:13,650 INFO L225 Difference]: With dead ends: 67 [2020-09-25 13:40:13,651 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 13:40:13,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:40:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 13:40:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-09-25 13:40:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 13:40:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-25 13:40:13,660 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2020-09-25 13:40:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:13,661 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-25 13:40:13,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:40:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-25 13:40:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 13:40:13,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:13,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:13,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:40:13,663 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:13,664 INFO L82 PathProgramCache]: Analyzing trace with hash 751787059, now seen corresponding path program 1 times [2020-09-25 13:40:13,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:13,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629054668] [2020-09-25 13:40:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:13,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:13,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:13,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 13:40:13,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:13,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-09-25 13:40:13,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:13,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:40:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 13:40:13,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:14,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:14,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:14,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:14,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:40:14,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:14,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:14,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:14,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:14,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629054668] [2020-09-25 13:40:14,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:14,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 13:40:14,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810228054] [2020-09-25 13:40:14,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 13:40:14,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 13:40:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:40:14,070 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 7 states. [2020-09-25 13:40:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:14,232 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-25 13:40:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 13:40:14,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-25 13:40:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:14,234 INFO L225 Difference]: With dead ends: 88 [2020-09-25 13:40:14,234 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 13:40:14,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 13:40:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-09-25 13:40:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-25 13:40:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-25 13:40:14,248 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 37 [2020-09-25 13:40:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:14,248 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-25 13:40:14,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 13:40:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-25 13:40:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 13:40:14,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:14,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:14,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:40:14,251 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:14,251 INFO L82 PathProgramCache]: Analyzing trace with hash 3796503, now seen corresponding path program 1 times [2020-09-25 13:40:14,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:14,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479843607] [2020-09-25 13:40:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:14,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:14,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:14,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 13:40:14,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:14,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-25 13:40:14,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:14,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:14,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:40:14,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 13:40:14,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 13:40:14,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:14,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:14,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:14,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:14,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:14,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:40:14,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:14,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:14,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:14,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:14,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479843607] [2020-09-25 13:40:14,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:14,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 13:40:14,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566888694] [2020-09-25 13:40:14,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 13:40:14,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 13:40:14,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:40:14,505 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 7 states. [2020-09-25 13:40:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:14,651 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-09-25 13:40:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 13:40:14,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 13:40:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:14,655 INFO L225 Difference]: With dead ends: 105 [2020-09-25 13:40:14,656 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 13:40:14,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 13:40:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-09-25 13:40:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 13:40:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 13:40:14,669 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 38 [2020-09-25 13:40:14,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:14,669 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 13:40:14,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 13:40:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 13:40:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 13:40:14,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:14,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:14,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:40:14,672 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:14,672 INFO L82 PathProgramCache]: Analyzing trace with hash 197728887, now seen corresponding path program 1 times [2020-09-25 13:40:14,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:14,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776793395] [2020-09-25 13:40:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:14,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:14,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:14,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 13:40:14,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:14,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-25 13:40:14,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:14,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:14,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:40:14,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 13:40:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 13:40:14,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:14,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:14,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:14,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:14,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:14,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:14,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:40:14,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:14,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:14,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:14,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:14,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:14,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:14,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776793395] [2020-09-25 13:40:14,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:14,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 13:40:14,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870478807] [2020-09-25 13:40:14,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 13:40:14,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:14,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 13:40:14,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:40:14,868 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 7 states. [2020-09-25 13:40:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:15,009 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-09-25 13:40:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 13:40:15,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 13:40:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:15,012 INFO L225 Difference]: With dead ends: 116 [2020-09-25 13:40:15,012 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 13:40:15,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 13:40:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-09-25 13:40:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-25 13:40:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2020-09-25 13:40:15,025 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 38 [2020-09-25 13:40:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:15,025 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2020-09-25 13:40:15,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 13:40:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2020-09-25 13:40:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 13:40:15,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:15,027 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:15,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:40:15,028 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 88652198, now seen corresponding path program 1 times [2020-09-25 13:40:15,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:15,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020350260] [2020-09-25 13:40:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:15,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:15,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:16,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:16,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 13:40:16,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:16,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-09-25 13:40:16,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:16,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:16,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:16,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:16,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 13:40:16,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:40:16,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:16,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:16,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:16,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:16,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:16,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:40:16,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:16,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:16,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:40:16,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 13:40:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:16,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:16,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 13:40:16,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:16,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 13:40:16,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:16,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:40:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:40:16,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:16,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020350260] [2020-09-25 13:40:16,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:16,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:16,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553234111] [2020-09-25 13:40:16,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:16,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:16,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:16,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:16,285 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 9 states. [2020-09-25 13:40:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:16,528 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-09-25 13:40:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:16,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 13:40:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:16,531 INFO L225 Difference]: With dead ends: 129 [2020-09-25 13:40:16,531 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 13:40:16,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 13:40:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 13:40:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2020-09-25 13:40:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 13:40:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-09-25 13:40:16,560 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 49 [2020-09-25 13:40:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:16,560 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-09-25 13:40:16,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-09-25 13:40:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 13:40:16,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:16,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:16,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 13:40:16,572 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1084443264, now seen corresponding path program 1 times [2020-09-25 13:40:16,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:16,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877629368] [2020-09-25 13:40:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:16,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:16,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:17,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:17,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 13:40:17,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:17,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-09-25 13:40:17,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:17,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:17,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:17,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:17,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 13:40:17,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:17,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:17,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:17,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:17,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:17,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:17,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:17,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:17,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:17,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:17,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:17,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:17,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:17,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877629368] [2020-09-25 13:40:17,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:17,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:17,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49429121] [2020-09-25 13:40:17,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:17,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:17,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:17,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:17,354 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 9 states. [2020-09-25 13:40:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:17,659 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2020-09-25 13:40:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:17,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 13:40:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:17,662 INFO L225 Difference]: With dead ends: 164 [2020-09-25 13:40:17,662 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 13:40:17,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 13:40:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 13:40:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-09-25 13:40:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-25 13:40:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-09-25 13:40:17,681 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 48 [2020-09-25 13:40:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:17,682 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-09-25 13:40:17,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-09-25 13:40:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 13:40:17,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:17,684 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:17,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 13:40:17,684 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1278375648, now seen corresponding path program 1 times [2020-09-25 13:40:17,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:17,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199331092] [2020-09-25 13:40:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:17,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:17,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:18,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:18,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 13:40:18,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:18,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-09-25 13:40:18,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:18,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:18,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:18,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 13:40:18,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 13:40:18,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:18,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:18,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:18,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:18,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:18,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:18,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:18,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:18,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:18,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199331092] [2020-09-25 13:40:18,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:18,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:18,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565304883] [2020-09-25 13:40:18,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:18,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:18,425 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 9 states. [2020-09-25 13:40:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:18,671 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-09-25 13:40:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:18,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 13:40:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:18,674 INFO L225 Difference]: With dead ends: 185 [2020-09-25 13:40:18,674 INFO L226 Difference]: Without dead ends: 183 [2020-09-25 13:40:18,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 13:40:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-25 13:40:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2020-09-25 13:40:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-25 13:40:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2020-09-25 13:40:18,686 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 48 [2020-09-25 13:40:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:18,687 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2020-09-25 13:40:18,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2020-09-25 13:40:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 13:40:18,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:18,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:18,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 13:40:18,689 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:18,690 INFO L82 PathProgramCache]: Analyzing trace with hash -287517810, now seen corresponding path program 2 times [2020-09-25 13:40:18,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:18,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346930952] [2020-09-25 13:40:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:18,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:18,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:19,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:19,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 13:40:19,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:19,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-09-25 13:40:19,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:19,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:19,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 13:40:19,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:19,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:19,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:19,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:19,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:19,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:19,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:40:19,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:19,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:19,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:19,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:19,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:19,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:19,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346930952] [2020-09-25 13:40:19,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:19,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:19,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39888219] [2020-09-25 13:40:19,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:19,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:19,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:19,358 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand 9 states. [2020-09-25 13:40:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:19,596 INFO L93 Difference]: Finished difference Result 227 states and 262 transitions. [2020-09-25 13:40:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 13:40:19,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 13:40:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:19,599 INFO L225 Difference]: With dead ends: 227 [2020-09-25 13:40:19,599 INFO L226 Difference]: Without dead ends: 225 [2020-09-25 13:40:19,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 13:40:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-25 13:40:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 184. [2020-09-25 13:40:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 13:40:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2020-09-25 13:40:19,616 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 48 [2020-09-25 13:40:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:19,625 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2020-09-25 13:40:19,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:19,626 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2020-09-25 13:40:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 13:40:19,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:19,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:19,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 13:40:19,630 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash 942147566, now seen corresponding path program 2 times [2020-09-25 13:40:19,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:19,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615421653] [2020-09-25 13:40:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:19,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:19,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:19,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:20,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:20,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 13:40:20,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:20,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-09-25 13:40:20,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:20,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:20,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:20,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:20,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 13:40:20,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:20,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:20,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:20,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:20,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:20,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:20,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:40:20,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:20,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:20,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:20,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:20,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:20,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:40:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:20,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615421653] [2020-09-25 13:40:20,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:20,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:20,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784075393] [2020-09-25 13:40:20,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:20,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:20,286 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 9 states. [2020-09-25 13:40:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:20,485 INFO L93 Difference]: Finished difference Result 257 states and 299 transitions. [2020-09-25 13:40:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 13:40:20,485 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 13:40:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:20,487 INFO L225 Difference]: With dead ends: 257 [2020-09-25 13:40:20,488 INFO L226 Difference]: Without dead ends: 255 [2020-09-25 13:40:20,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 13:40:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-25 13:40:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 215. [2020-09-25 13:40:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 13:40:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 13:40:20,499 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 48 [2020-09-25 13:40:20,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:20,500 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 13:40:20,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 13:40:20,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 13:40:20,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:20,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:20,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 13:40:20,502 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1391225462, now seen corresponding path program 1 times [2020-09-25 13:40:20,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:20,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555597615] [2020-09-25 13:40:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:20,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:20,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:21,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:21,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 13:40:21,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:21,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-09-25 13:40:21,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:21,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:21,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:21,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 13:40:21,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 13:40:21,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:21,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:21,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:21,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:21,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:21,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:21,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:21,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:21,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:21,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:40:21,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 13:40:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:21,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:21,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:21,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 13:40:21,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:21,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 13:40:21,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:21,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:21,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:40:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:40:21,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:21,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555597615] [2020-09-25 13:40:21,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:21,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:21,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672350350] [2020-09-25 13:40:21,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:21,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:21,546 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 13:40:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:21,746 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2020-09-25 13:40:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:21,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 13:40:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:21,749 INFO L225 Difference]: With dead ends: 245 [2020-09-25 13:40:21,749 INFO L226 Difference]: Without dead ends: 243 [2020-09-25 13:40:21,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 13:40:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-25 13:40:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2020-09-25 13:40:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 13:40:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 13:40:21,760 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 50 [2020-09-25 13:40:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:21,761 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 13:40:21,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 13:40:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 13:40:21,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:21,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:21,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 13:40:21,763 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1955950980, now seen corresponding path program 1 times [2020-09-25 13:40:21,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:21,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182181003] [2020-09-25 13:40:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:21,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:21,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:21,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:22,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:22,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 13:40:22,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:22,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-09-25 13:40:22,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:22,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:22,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 13:40:22,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 13:40:22,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:22,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:22,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:22,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:22,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:22,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:22,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:22,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:22,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:22,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:22,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:22,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:22,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:22,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182181003] [2020-09-25 13:40:22,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:22,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:22,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064780558] [2020-09-25 13:40:22,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:22,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:22,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:22,472 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 13:40:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:22,689 INFO L93 Difference]: Finished difference Result 286 states and 334 transitions. [2020-09-25 13:40:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 13:40:22,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 13:40:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:22,692 INFO L225 Difference]: With dead ends: 286 [2020-09-25 13:40:22,692 INFO L226 Difference]: Without dead ends: 284 [2020-09-25 13:40:22,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 13:40:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-25 13:40:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2020-09-25 13:40:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-25 13:40:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2020-09-25 13:40:22,712 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 49 [2020-09-25 13:40:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:22,713 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2020-09-25 13:40:22,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2020-09-25 13:40:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 13:40:22,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:22,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:22,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 13:40:22,714 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:22,715 INFO L82 PathProgramCache]: Analyzing trace with hash -798805526, now seen corresponding path program 1 times [2020-09-25 13:40:22,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:22,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749878938] [2020-09-25 13:40:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:22,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:22,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:22,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:23,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:23,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 13:40:23,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:23,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-09-25 13:40:23,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:23,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:23,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:23,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 13:40:23,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 13:40:23,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:23,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:23,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:23,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:23,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:23,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:23,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:23,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:23,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:23,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:23,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:23,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:23,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:23,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 13:40:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:23,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:23,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:23,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 13:40:23,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:23,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 13:40:23,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:23,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:23,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:40:23,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:23,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:40:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:23,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749878938] [2020-09-25 13:40:23,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:23,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:23,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912825270] [2020-09-25 13:40:23,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:23,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:23,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:23,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:23,646 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand 9 states. [2020-09-25 13:40:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:23,847 INFO L93 Difference]: Finished difference Result 248 states and 290 transitions. [2020-09-25 13:40:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 13:40:23,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 13:40:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:23,849 INFO L225 Difference]: With dead ends: 248 [2020-09-25 13:40:23,849 INFO L226 Difference]: Without dead ends: 199 [2020-09-25 13:40:23,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-25 13:40:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-25 13:40:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-09-25 13:40:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-09-25 13:40:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 229 transitions. [2020-09-25 13:40:23,865 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 229 transitions. Word has length 50 [2020-09-25 13:40:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:23,865 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 229 transitions. [2020-09-25 13:40:23,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 229 transitions. [2020-09-25 13:40:23,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 13:40:23,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:23,866 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:23,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 13:40:23,867 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:23,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004924, now seen corresponding path program 2 times [2020-09-25 13:40:23,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:23,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896866072] [2020-09-25 13:40:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:23,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:23,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:23,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:24,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:24,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 13:40:24,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:40:24,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-09-25 13:40:24,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:24,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:40:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 13:40:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 13:40:24,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:24,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:24,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:24,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:24,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:24,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:24,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:24,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:24,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:24,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:24,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:24,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:24,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:24,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896866072] [2020-09-25 13:40:24,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:24,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:40:24,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722175100] [2020-09-25 13:40:24,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:40:24,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:24,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:40:24,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:40:24,478 INFO L87 Difference]: Start difference. First operand 199 states and 229 transitions. Second operand 9 states. [2020-09-25 13:40:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:24,641 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2020-09-25 13:40:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 13:40:24,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 13:40:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:24,643 INFO L225 Difference]: With dead ends: 247 [2020-09-25 13:40:24,643 INFO L226 Difference]: Without dead ends: 240 [2020-09-25 13:40:24,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 13:40:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-25 13:40:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2020-09-25 13:40:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-09-25 13:40:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 255 transitions. [2020-09-25 13:40:24,653 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 255 transitions. Word has length 49 [2020-09-25 13:40:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:24,654 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 255 transitions. [2020-09-25 13:40:24,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:40:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 255 transitions. [2020-09-25 13:40:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:24,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:24,655 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:24,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 13:40:24,655 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash 320690707, now seen corresponding path program 3 times [2020-09-25 13:40:24,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:24,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888836619] [2020-09-25 13:40:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:24,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:24,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:24,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:24,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:24,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:24,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:26,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:26,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:26,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:26,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2040 [2020-09-25 13:40:26,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:26,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:26,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:26,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:26,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:26,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:26,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:26,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:26,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:26,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:26,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:26,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:26,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:26,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:26,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:26,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:26,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:26,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888836619] [2020-09-25 13:40:26,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:26,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:26,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008479292] [2020-09-25 13:40:26,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:26,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:26,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:26,822 INFO L87 Difference]: Start difference. First operand 221 states and 255 transitions. Second operand 10 states. [2020-09-25 13:40:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:27,118 INFO L93 Difference]: Finished difference Result 303 states and 349 transitions. [2020-09-25 13:40:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 13:40:27,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 13:40:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:27,121 INFO L225 Difference]: With dead ends: 303 [2020-09-25 13:40:27,121 INFO L226 Difference]: Without dead ends: 290 [2020-09-25 13:40:27,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-25 13:40:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-25 13:40:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 232. [2020-09-25 13:40:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-25 13:40:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 268 transitions. [2020-09-25 13:40:27,134 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 268 transitions. Word has length 59 [2020-09-25 13:40:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:27,135 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 268 transitions. [2020-09-25 13:40:27,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 268 transitions. [2020-09-25 13:40:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:27,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:27,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:27,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 13:40:27,142 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:27,143 INFO L82 PathProgramCache]: Analyzing trace with hash 514623091, now seen corresponding path program 1 times [2020-09-25 13:40:27,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:27,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360550343] [2020-09-25 13:40:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:27,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:27,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:27,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:27,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:27,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:29,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:29,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:29,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:29,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2352 [2020-09-25 13:40:29,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:29,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:29,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 13:40:29,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:29,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:29,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:29,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:29,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:29,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:29,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:29,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:29,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:40:29,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:29,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:29,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:29,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360550343] [2020-09-25 13:40:29,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:29,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 13:40:29,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599165084] [2020-09-25 13:40:29,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 13:40:29,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 13:40:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:40:29,650 INFO L87 Difference]: Start difference. First operand 232 states and 268 transitions. Second operand 11 states. [2020-09-25 13:40:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:29,989 INFO L93 Difference]: Finished difference Result 314 states and 363 transitions. [2020-09-25 13:40:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 13:40:29,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 13:40:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:29,992 INFO L225 Difference]: With dead ends: 314 [2020-09-25 13:40:29,992 INFO L226 Difference]: Without dead ends: 304 [2020-09-25 13:40:29,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 13:40:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-25 13:40:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 266. [2020-09-25 13:40:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-25 13:40:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 309 transitions. [2020-09-25 13:40:30,020 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 309 transitions. Word has length 59 [2020-09-25 13:40:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:30,020 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 309 transitions. [2020-09-25 13:40:30,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 13:40:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 309 transitions. [2020-09-25 13:40:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:30,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:30,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:30,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 13:40:30,022 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:30,023 INFO L82 PathProgramCache]: Analyzing trace with hash -214388301, now seen corresponding path program 2 times [2020-09-25 13:40:30,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:30,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191598650] [2020-09-25 13:40:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:30,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:30,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:30,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:30,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:30,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:30,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:32,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:32,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:32,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2134 [2020-09-25 13:40:32,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:32,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 13:40:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:32,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:32,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:32,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:32,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:32,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:32,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:32,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:32,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:32,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:32,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:32,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:32,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:32,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:40:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:32,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191598650] [2020-09-25 13:40:32,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:32,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 13:40:32,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718080283] [2020-09-25 13:40:32,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 13:40:32,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:32,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 13:40:32,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:40:32,288 INFO L87 Difference]: Start difference. First operand 266 states and 309 transitions. Second operand 11 states. [2020-09-25 13:40:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:32,594 INFO L93 Difference]: Finished difference Result 383 states and 446 transitions. [2020-09-25 13:40:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 13:40:32,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 13:40:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:32,597 INFO L225 Difference]: With dead ends: 383 [2020-09-25 13:40:32,597 INFO L226 Difference]: Without dead ends: 373 [2020-09-25 13:40:32,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-09-25 13:40:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-09-25 13:40:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 351. [2020-09-25 13:40:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-09-25 13:40:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 409 transitions. [2020-09-25 13:40:32,625 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 409 transitions. Word has length 59 [2020-09-25 13:40:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:32,625 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 409 transitions. [2020-09-25 13:40:32,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 13:40:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 409 transitions. [2020-09-25 13:40:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:32,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:32,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:32,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 13:40:32,627 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash -20455917, now seen corresponding path program 3 times [2020-09-25 13:40:32,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:32,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132003329] [2020-09-25 13:40:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:32,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:32,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:32,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:32,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:34,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:34,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:34,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:34,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2014 [2020-09-25 13:40:34,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:34,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:34,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:34,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:34,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:34,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:34,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:34,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:34,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:34,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:34,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:34,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:34,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:34,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:34,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:34,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132003329] [2020-09-25 13:40:34,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:34,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:34,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708517488] [2020-09-25 13:40:34,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:34,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:34,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:34,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:34,744 INFO L87 Difference]: Start difference. First operand 351 states and 409 transitions. Second operand 10 states. [2020-09-25 13:40:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:35,042 INFO L93 Difference]: Finished difference Result 456 states and 530 transitions. [2020-09-25 13:40:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 13:40:35,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 13:40:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:35,048 INFO L225 Difference]: With dead ends: 456 [2020-09-25 13:40:35,048 INFO L226 Difference]: Without dead ends: 443 [2020-09-25 13:40:35,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-25 13:40:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-09-25 13:40:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 405. [2020-09-25 13:40:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-09-25 13:40:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 472 transitions. [2020-09-25 13:40:35,065 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 472 transitions. Word has length 59 [2020-09-25 13:40:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:35,066 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 472 transitions. [2020-09-25 13:40:35,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 472 transitions. [2020-09-25 13:40:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:35,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:35,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:35,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 13:40:35,068 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -193250235, now seen corresponding path program 4 times [2020-09-25 13:40:35,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:35,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794435144] [2020-09-25 13:40:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:35,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:35,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:35,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:35,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:35,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:35,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:35,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:36,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:36,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:36,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:36,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1816 [2020-09-25 13:40:36,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:36,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:36,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:36,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:36,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:36,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:36,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:36,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:36,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:36,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:36,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:36,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:36,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:36,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:36,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794435144] [2020-09-25 13:40:36,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:36,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:36,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749331442] [2020-09-25 13:40:36,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:36,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:36,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:36,993 INFO L87 Difference]: Start difference. First operand 405 states and 472 transitions. Second operand 10 states. [2020-09-25 13:40:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:37,225 INFO L93 Difference]: Finished difference Result 540 states and 627 transitions. [2020-09-25 13:40:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:37,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 13:40:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:37,229 INFO L225 Difference]: With dead ends: 540 [2020-09-25 13:40:37,229 INFO L226 Difference]: Without dead ends: 530 [2020-09-25 13:40:37,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 13:40:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-09-25 13:40:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 426. [2020-09-25 13:40:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-09-25 13:40:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 497 transitions. [2020-09-25 13:40:37,248 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 497 transitions. Word has length 59 [2020-09-25 13:40:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:37,248 INFO L479 AbstractCegarLoop]: Abstraction has 426 states and 497 transitions. [2020-09-25 13:40:37,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 497 transitions. [2020-09-25 13:40:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:37,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:37,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:37,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 13:40:37,250 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash 682149, now seen corresponding path program 3 times [2020-09-25 13:40:37,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:37,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782757805] [2020-09-25 13:40:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:37,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:37,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:37,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:37,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:37,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:37,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:38,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:38,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:38,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:38,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1721 [2020-09-25 13:40:38,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:38,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:38,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 13:40:38,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:38,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:38,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:39,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:39,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:39,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:39,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:39,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:39,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:40:39,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:39,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:39,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:39,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:39,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782757805] [2020-09-25 13:40:39,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:39,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 13:40:39,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155210217] [2020-09-25 13:40:39,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 13:40:39,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:39,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 13:40:39,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:40:39,093 INFO L87 Difference]: Start difference. First operand 426 states and 497 transitions. Second operand 11 states. [2020-09-25 13:40:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:39,462 INFO L93 Difference]: Finished difference Result 560 states and 653 transitions. [2020-09-25 13:40:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 13:40:39,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 13:40:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:39,467 INFO L225 Difference]: With dead ends: 560 [2020-09-25 13:40:39,467 INFO L226 Difference]: Without dead ends: 550 [2020-09-25 13:40:39,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-09-25 13:40:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-09-25 13:40:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 522. [2020-09-25 13:40:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-25 13:40:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 612 transitions. [2020-09-25 13:40:39,493 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 612 transitions. Word has length 59 [2020-09-25 13:40:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:39,494 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 612 transitions. [2020-09-25 13:40:39,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 13:40:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 612 transitions. [2020-09-25 13:40:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:39,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:39,496 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:39,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 13:40:39,497 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:39,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1565211309, now seen corresponding path program 5 times [2020-09-25 13:40:39,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:39,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995667384] [2020-09-25 13:40:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:39,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:39,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:39,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:39,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:39,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:39,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:41,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:41,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:41,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:41,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1744 [2020-09-25 13:40:41,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:41,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:41,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:41,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:41,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:41,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:41,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:41,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:41,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:40:41,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:41,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:41,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:41,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:41,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995667384] [2020-09-25 13:40:41,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:41,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:41,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028558179] [2020-09-25 13:40:41,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:41,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:41,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:41,347 INFO L87 Difference]: Start difference. First operand 522 states and 612 transitions. Second operand 10 states. [2020-09-25 13:40:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:41,660 INFO L93 Difference]: Finished difference Result 600 states and 700 transitions. [2020-09-25 13:40:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 13:40:41,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 13:40:41,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:41,666 INFO L225 Difference]: With dead ends: 600 [2020-09-25 13:40:41,666 INFO L226 Difference]: Without dead ends: 593 [2020-09-25 13:40:41,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 13:40:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-09-25 13:40:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 554. [2020-09-25 13:40:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-09-25 13:40:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 650 transitions. [2020-09-25 13:40:41,697 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 650 transitions. Word has length 59 [2020-09-25 13:40:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:41,698 INFO L479 AbstractCegarLoop]: Abstraction has 554 states and 650 transitions. [2020-09-25 13:40:41,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 650 transitions. [2020-09-25 13:40:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:41,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:41,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:41,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 13:40:41,701 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash -335545933, now seen corresponding path program 4 times [2020-09-25 13:40:41,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:41,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018555530] [2020-09-25 13:40:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:41,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:41,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:41,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:41,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:41,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:43,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:43,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:43,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:43,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1968 [2020-09-25 13:40:43,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:43,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:43,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 13:40:43,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:43,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:43,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:43,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:43,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:43,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:43,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:43,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:43,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:43,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:43,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:43,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:43,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018555530] [2020-09-25 13:40:43,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:43,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 13:40:43,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434695509] [2020-09-25 13:40:43,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 13:40:43,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:43,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 13:40:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:40:43,798 INFO L87 Difference]: Start difference. First operand 554 states and 650 transitions. Second operand 11 states. [2020-09-25 13:40:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:44,042 INFO L93 Difference]: Finished difference Result 706 states and 827 transitions. [2020-09-25 13:40:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:44,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 13:40:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:44,047 INFO L225 Difference]: With dead ends: 706 [2020-09-25 13:40:44,048 INFO L226 Difference]: Without dead ends: 699 [2020-09-25 13:40:44,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-25 13:40:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-09-25 13:40:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 639. [2020-09-25 13:40:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-09-25 13:40:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 751 transitions. [2020-09-25 13:40:44,079 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 751 transitions. Word has length 59 [2020-09-25 13:40:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:44,079 INFO L479 AbstractCegarLoop]: Abstraction has 639 states and 751 transitions. [2020-09-25 13:40:44,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 13:40:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 751 transitions. [2020-09-25 13:40:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:44,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:44,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:44,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 13:40:44,081 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463589, now seen corresponding path program 5 times [2020-09-25 13:40:44,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:44,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196327634] [2020-09-25 13:40:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:44,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:44,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:44,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:44,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:44,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:44,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:45,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:45,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:45,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:45,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-09-25 13:40:45,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:45,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:45,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 13:40:45,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:45,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:45,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:45,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:45,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:45,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:45,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:45,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:45,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:45,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:45,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:45,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:45,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196327634] [2020-09-25 13:40:45,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:45,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 13:40:45,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727471632] [2020-09-25 13:40:45,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 13:40:45,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:45,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 13:40:45,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:40:45,921 INFO L87 Difference]: Start difference. First operand 639 states and 751 transitions. Second operand 11 states. [2020-09-25 13:40:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:46,132 INFO L93 Difference]: Finished difference Result 737 states and 865 transitions. [2020-09-25 13:40:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:46,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 13:40:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:46,136 INFO L225 Difference]: With dead ends: 737 [2020-09-25 13:40:46,137 INFO L226 Difference]: Without dead ends: 730 [2020-09-25 13:40:46,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-25 13:40:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-09-25 13:40:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 705. [2020-09-25 13:40:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2020-09-25 13:40:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 829 transitions. [2020-09-25 13:40:46,164 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 829 transitions. Word has length 59 [2020-09-25 13:40:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:46,164 INFO L479 AbstractCegarLoop]: Abstraction has 705 states and 829 transitions. [2020-09-25 13:40:46,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 13:40:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 829 transitions. [2020-09-25 13:40:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:46,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:46,166 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:46,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-25 13:40:46,166 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2112571323, now seen corresponding path program 4 times [2020-09-25 13:40:46,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:46,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615090535] [2020-09-25 13:40:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:46,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:46,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:46,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:46,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:46,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:46,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:47,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:47,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:47,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:47,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1485 [2020-09-25 13:40:47,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:47,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:47,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:47,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:47,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:47,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:47,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:47,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:47,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:47,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:47,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:47,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:47,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:47,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:47,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:47,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:47,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:47,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:47,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615090535] [2020-09-25 13:40:47,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:47,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:47,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898283829] [2020-09-25 13:40:47,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:47,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:47,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:47,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:47,756 INFO L87 Difference]: Start difference. First operand 705 states and 829 transitions. Second operand 10 states. [2020-09-25 13:40:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:48,063 INFO L93 Difference]: Finished difference Result 868 states and 1017 transitions. [2020-09-25 13:40:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:48,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 13:40:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:48,068 INFO L225 Difference]: With dead ends: 868 [2020-09-25 13:40:48,068 INFO L226 Difference]: Without dead ends: 858 [2020-09-25 13:40:48,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 13:40:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-09-25 13:40:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 747. [2020-09-25 13:40:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-09-25 13:40:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 878 transitions. [2020-09-25 13:40:48,124 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 878 transitions. Word has length 59 [2020-09-25 13:40:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:48,124 INFO L479 AbstractCegarLoop]: Abstraction has 747 states and 878 transitions. [2020-09-25 13:40:48,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 878 transitions. [2020-09-25 13:40:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:48,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:48,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:48,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-25 13:40:48,126 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash 616502515, now seen corresponding path program 6 times [2020-09-25 13:40:48,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:48,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363276591] [2020-09-25 13:40:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:48,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:48,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:48,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:48,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:48,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:48,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:49,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:49,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:49,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1748 [2020-09-25 13:40:49,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:49,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 13:40:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:49,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:49,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:49,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:49,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:49,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:49,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:49,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:49,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:49,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:49,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363276591] [2020-09-25 13:40:49,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:49,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 13:40:49,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094929433] [2020-09-25 13:40:49,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 13:40:49,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:49,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 13:40:49,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:40:49,999 INFO L87 Difference]: Start difference. First operand 747 states and 878 transitions. Second operand 11 states. [2020-09-25 13:40:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:50,363 INFO L93 Difference]: Finished difference Result 895 states and 1051 transitions. [2020-09-25 13:40:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 13:40:50,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 13:40:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:50,367 INFO L225 Difference]: With dead ends: 895 [2020-09-25 13:40:50,368 INFO L226 Difference]: Without dead ends: 885 [2020-09-25 13:40:50,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-09-25 13:40:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-09-25 13:40:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 844. [2020-09-25 13:40:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-09-25 13:40:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 993 transitions. [2020-09-25 13:40:50,404 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 993 transitions. Word has length 59 [2020-09-25 13:40:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:50,404 INFO L479 AbstractCegarLoop]: Abstraction has 844 states and 993 transitions. [2020-09-25 13:40:50,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 13:40:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 993 transitions. [2020-09-25 13:40:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 13:40:50,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:50,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:50,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-25 13:40:50,407 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:50,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1846167891, now seen corresponding path program 5 times [2020-09-25 13:40:50,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:50,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522777322] [2020-09-25 13:40:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:50,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:50,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:50,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:50,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:50,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:50,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:51,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:51,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 13:40:51,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:51,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-09-25 13:40:51,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:51,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:51,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:51,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 13:40:51,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:51,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:52,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:52,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:52,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:52,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:52,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:52,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:52,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522777322] [2020-09-25 13:40:52,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:52,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:52,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111115593] [2020-09-25 13:40:52,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:52,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:52,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:52,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:52,079 INFO L87 Difference]: Start difference. First operand 844 states and 993 transitions. Second operand 10 states. [2020-09-25 13:40:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:52,381 INFO L93 Difference]: Finished difference Result 960 states and 1125 transitions. [2020-09-25 13:40:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 13:40:52,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 13:40:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:52,386 INFO L225 Difference]: With dead ends: 960 [2020-09-25 13:40:52,386 INFO L226 Difference]: Without dead ends: 953 [2020-09-25 13:40:52,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 13:40:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2020-09-25 13:40:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 876. [2020-09-25 13:40:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-09-25 13:40:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1031 transitions. [2020-09-25 13:40:52,418 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1031 transitions. Word has length 59 [2020-09-25 13:40:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:52,418 INFO L479 AbstractCegarLoop]: Abstraction has 876 states and 1031 transitions. [2020-09-25 13:40:52,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1031 transitions. [2020-09-25 13:40:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 13:40:52,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:52,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:52,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-25 13:40:52,420 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:52,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1385223511, now seen corresponding path program 3 times [2020-09-25 13:40:52,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:52,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450250476] [2020-09-25 13:40:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:52,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:52,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:52,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:52,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:52,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:52,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-09-25 13:40:54,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:54,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:54,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:54,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 13:40:54,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:54,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:54,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:54,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:54,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:54,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:54,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:54,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:54,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:54,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:54,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:54,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:54,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:54,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:54,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450250476] [2020-09-25 13:40:54,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:54,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:54,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101288695] [2020-09-25 13:40:54,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:54,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:54,177 INFO L87 Difference]: Start difference. First operand 876 states and 1031 transitions. Second operand 10 states. [2020-09-25 13:40:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:54,453 INFO L93 Difference]: Finished difference Result 990 states and 1162 transitions. [2020-09-25 13:40:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 13:40:54,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-25 13:40:54,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:54,458 INFO L225 Difference]: With dead ends: 990 [2020-09-25 13:40:54,458 INFO L226 Difference]: Without dead ends: 983 [2020-09-25 13:40:54,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 13:40:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-09-25 13:40:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 888. [2020-09-25 13:40:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-09-25 13:40:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1047 transitions. [2020-09-25 13:40:54,490 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1047 transitions. Word has length 60 [2020-09-25 13:40:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:54,491 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1047 transitions. [2020-09-25 13:40:54,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1047 transitions. [2020-09-25 13:40:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 13:40:54,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:54,492 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:54,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-25 13:40:54,492 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash 656212119, now seen corresponding path program 4 times [2020-09-25 13:40:54,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:54,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821293594] [2020-09-25 13:40:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:54,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:54,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:54,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:54,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:54,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:54,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:56,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:56,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 13:40:56,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:56,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-09-25 13:40:56,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:56,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:56,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:56,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 13:40:56,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:56,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:56,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:56,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:56,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:56,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:56,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:56,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:56,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:56,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:56,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:56,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821293594] [2020-09-25 13:40:56,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:56,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:56,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382493198] [2020-09-25 13:40:56,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:56,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:56,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:56,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:56,171 INFO L87 Difference]: Start difference. First operand 888 states and 1047 transitions. Second operand 10 states. [2020-09-25 13:40:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:56,427 INFO L93 Difference]: Finished difference Result 994 states and 1168 transitions. [2020-09-25 13:40:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:40:56,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-25 13:40:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:56,432 INFO L225 Difference]: With dead ends: 994 [2020-09-25 13:40:56,432 INFO L226 Difference]: Without dead ends: 987 [2020-09-25 13:40:56,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 13:40:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-09-25 13:40:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 921. [2020-09-25 13:40:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921 states. [2020-09-25 13:40:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1087 transitions. [2020-09-25 13:40:56,465 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1087 transitions. Word has length 60 [2020-09-25 13:40:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:56,465 INFO L479 AbstractCegarLoop]: Abstraction has 921 states and 1087 transitions. [2020-09-25 13:40:56,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1087 transitions. [2020-09-25 13:40:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 13:40:56,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:56,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:56,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-25 13:40:56,467 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 104942935, now seen corresponding path program 5 times [2020-09-25 13:40:56,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:56,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619326934] [2020-09-25 13:40:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:56,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:56,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:56,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:56,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:56,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:56,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:58,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:58,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 13:40:58,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:40:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1591 [2020-09-25 13:40:58,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:58,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 13:40:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 13:40:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 13:40:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:40:58,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:40:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:58,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:58,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:40:58,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:40:58,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:40:58,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:40:58,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:40:58,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:40:58,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:40:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:40:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:40:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:40:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:40:58,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619326934] [2020-09-25 13:40:58,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:40:58,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:40:58,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782235778] [2020-09-25 13:40:58,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:40:58,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:40:58,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:40:58,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:40:58,166 INFO L87 Difference]: Start difference. First operand 921 states and 1087 transitions. Second operand 10 states. [2020-09-25 13:40:58,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:40:58,577 INFO L93 Difference]: Finished difference Result 1051 states and 1237 transitions. [2020-09-25 13:40:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 13:40:58,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-25 13:40:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:40:58,581 INFO L225 Difference]: With dead ends: 1051 [2020-09-25 13:40:58,582 INFO L226 Difference]: Without dead ends: 1041 [2020-09-25 13:40:58,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-25 13:40:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2020-09-25 13:40:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 932. [2020-09-25 13:40:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-09-25 13:40:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1100 transitions. [2020-09-25 13:40:58,616 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1100 transitions. Word has length 60 [2020-09-25 13:40:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:40:58,616 INFO L479 AbstractCegarLoop]: Abstraction has 932 states and 1100 transitions. [2020-09-25 13:40:58,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:40:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1100 transitions. [2020-09-25 13:40:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 13:40:58,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:40:58,618 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:40:58,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-25 13:40:58,619 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:40:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:40:58,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1542070112, now seen corresponding path program 6 times [2020-09-25 13:40:58,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:40:58,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44174174] [2020-09-25 13:40:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:40:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:40:58,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:58,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:58,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:58,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:58,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:59,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:59,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:59,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:59,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:59,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:40:59,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:01,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:41:01,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 13:41:01,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 13:41:01,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2641 [2020-09-25 13:41:01,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:41:01,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:41:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 13:41:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 13:41:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 13:41:01,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:41:01,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:41:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:41:01,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:01,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:41:01,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:41:01,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:41:01,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:41:01,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:41:01,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:41:01,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:41:01,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:41:01,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:41:01,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:41:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-25 13:41:01,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44174174] [2020-09-25 13:41:01,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:41:01,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 13:41:01,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115876651] [2020-09-25 13:41:01,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 13:41:01,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:41:01,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 13:41:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:41:01,311 INFO L87 Difference]: Start difference. First operand 932 states and 1100 transitions. Second operand 6 states. [2020-09-25 13:41:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:41:01,375 INFO L93 Difference]: Finished difference Result 941 states and 1109 transitions. [2020-09-25 13:41:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 13:41:01,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-09-25 13:41:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:41:01,376 INFO L225 Difference]: With dead ends: 941 [2020-09-25 13:41:01,376 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 13:41:01,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:41:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 13:41:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 13:41:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 13:41:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 13:41:01,380 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2020-09-25 13:41:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:41:01,380 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 13:41:01,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 13:41:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 13:41:01,380 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 13:41:01,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-25 13:41:01,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 13:41:01,512 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 89